particle

English - Turkish

Definition of particle in English Turkish dictionary

{i} parçacık

Büyük Hadron Çarpıştırıcısı dünyanın en büyük parçacık hızlandırıcısıdır. - The Large Hadron Collider is the world's largest particle accelerator.

Bazı bilim adamları yer çekiminin ışık hızıyla seyahat eden graviton denilen parçacıklardan yapıldığını düşünüyor. - Some scientists think that gravity is made up of particles called gravitons which travel at the speed of light.

{i} tanecik

{i} ilgeç

(Dilbilim) ilgec

parça

Her tür atomun içinde protonlar, nötronlar ve elektronlar denilen belirli benzersiz parçacıkları vardır. - Each kind of atom has a certain unique number of particles called protons, neutrons, and electrons in it.

Ben saydam bir göz küresi olurum; ben hiçbir şeyim; Ben her şeyi görürüm; Evrensel varlığın akımları beni dolaşır; Ben Allah'ın parçası ya da parçacığıyım. - I become a transparent eyeball; I am nothing; I see all; the currents of the Universal Being circulate through me; I am part or particle of God.

{i} molekül

(İnşaat) toz

Tom aylardır klavyesini temizlememişti, ve o tozla, gıda parçalarıyla ve Allah bilir başka neyle dolmuştu. - Tom hadn't cleaned his keyboard for months, and it was clogged with dust, food particles, and God knows what else.

{i} edat

Bu edat bir ismi bir fiile dönüştürür. - This particle turns a noun into a verb.

tanımlık

tane

Kar taneleri kar parçacıklarıdır. - Snowflakes are particles of snow.

{i} takı

(Tıp) Tanecik, atom, cüz, zerre, partikül

(Biyoloji) partikül

{i} dilb. edat; ek, takı

nesne

Uranus'un kara, kaya parçaları şeklinde nesneleri içeren, onbir bilinen halkası vardır. - Uranus has eleven known rings, which contain dark, boulder-sized particles.

(İnşaat) lif levha

(Matbaacılık, Basımcılık) mika

particle displacement

(Bilgisayar) parçacık yer değiştirmesi

particle orientation

(Bilgisayar) parçacık yönelimi

particle velocity

(Askeri) parçacık hızı

particle accelerator

tanecik hızlandırıcı

particle accelerator

parçacık hızlandırıcısı

particle size analysis

tane büyüklüğü analizi

particle theory of light

ışığın tanecik teorisi

particle velocity

tanecik hızı

Particle image velocimeter

Parçacık görüntü hız ölçeri

Particle image velocimetry

Parçacık görüntü hız ölçümü

particle emission

partikül emisyonu

particle flux density

tanecik akı yoğunluğu

particle oscillation

parçacık salınımı

particle physics

Parçacık fiziği

particle radiation

parçacık ışınımı

particle shape

parçacık biçimi, tane biçimi

particle size

parçacık büyüklüğü, tane büyüklüğü

particle size distribution

tane büyüklüğü dağılımı

particle swarm optimization

(Bilgisayar) Parçacık sürü optimizasyonu

particle beam weapon

(Askeri) parçacık ışın silahı

particle beam; patrol boat; President's budget

(Askeri) parçacık ışın; küçük karakol/devriye botu; Başkanın bütçesi

particle cuurent density

(Nükleer Bilimler) parçacık akım yoğunluğu

particle diameter

dane çapı

particle diameter

(Askeri) parçaçık çapı

particle displacement

parcacik yer degistirmesi

particle emmision

(Nükleer Bilimler) parçacık yayınımı

particle fluence

(Nükleer Bilimler) tanecik akımı

particle fluence

(Nükleer Bilimler) parçacık integral akı

particle fluence rate

(Nükleer Bilimler) parçacık integral akı hızı

particle fluence rate

(Nükleer Bilimler) tanecik akım

particle flux density

(Nükleer Bilimler) parçacık akı yoğunluğu,tanecik akı yoğunluğu

particle orientation

parcacik yonelimi

particle shape

(İnşaat) parça şekli

particle size

(Nükleer Bilimler) parçacık boyutu

particle size distribution

dane boyu dağılımı

particle size of powder

toz tane büyüklüğü

particle trajectory model

(Denizbilim,Meteoroloji) parçacık izleme modeli

particle ınduced xrf

(Nükleer Bilimler) (pixe) parçacık uyarımlı xrf

smoothed particle hydrodynamics

Düzleştirilmiş tanecik hidrodinamiği

(Fizik) acayip parçacık

accelerated particle

hızlandırılmış tanecik

effective particle density

efektif parçacık yoğunluğu

elementary particle

temel parçacık

elementary particle

öz parçacık

fundamental particle

independent particle model

bağımsız tanecik modeli

interrogative particle

soru eki

ionizing particle

iyonlaştırıcı parçacık

solid particle

katı tanecik

alpha particle

elektriksel yükü pozitif olan, iki nötron ve iki protondan oluşan, Uranyum ve Radyum da dahil olmak üzere bazı radyoaktif elementlerden yayınan küçük, çok yüksek hızlı ve elektriksel yüklü parçacık

independent particle

model bağımsız tanecik modeli

negation particle

olumsuzluk edatı, olumsuzluk öğesi

nobiliary particle

soylulara ait parçacık

particles

parçacıklar

Kar taneleri kar parçacıklarıdır. - Snowflakes are particles of snow.

recoil particle

geritepki parçacığı

relating to a subatomic particle

bir atomaltı parçacık ile ilgili

relativistic particle

(Nükleer Bilimler) yüklü parçacık,yüklü tanecik

coated particle

(Nükleer Bilimler) kaplanmış parçacık

differential particle flux density

(Nükleer Bilimler) diferansiyel parçacık akı yoğunluıu

directly ionizing particle

(Nükleer Bilimler) doğrudan iyonlayıcı parçacık

elementary particle

(Nükleer Bilimler) elemanter parçacık,temel parçacık

falling particle

(Askeri) çökelen parçacık

indirectly ionizing particle

(Çevre) dolaylı iyonlayan parçacık

instantaneous particle velocity

anlik parcacik hizi

magnetic particle inspection

(Nükleer Bilimler) magnetik parçacık muayenesi

mobility of a charged particle

(Bilgisayar) devingenlik yüklü parçacık

negation particle

(Dilbilim) olumsuzluk eki

nuclear particle

(Nükleer Bilimler) nükleer tanecik

projectile particle

(Nükleer Bilimler) mermi parçacık

recoil particle

(Nükleer Bilimler) geri tepen parçacık

rounded particle

yuvarlatılmış tanecik

solid particle

sert tanecik

spherical earth particle

küresel toprak parçacığı

strange particle

(Nükleer Bilimler) acaip parçacık

suspended particle

ne yüzen ne de batan

suspended particle

asılı parça

suspended particle

askıda kalan

suspended particle

(Askeri) asılı parçacık

virtual particle

(Nükleer Bilimler) hayali parçacık

English - English

Definition of particle in English English dictionary: A word that has a particular grammatical function but does not obviously belong to any particular part of speech, such as the word to in English infinitives or O as the vocative particle; An elementary particle or subatomic particle; A body with very small size; a fragment; {n} a small part or word, an atom; A subordinate word that is never inflected (a preposition, conjunction, interjection); or a word that can not be used except in compositions; as, ward in backward, ly in lovely; a function word that can be used in English to form phrasal verbs a body having finite mass and internal structure but negligible dimensions; A particle of something is a very small piece or amount of it. There is a particle of truth in his statement. food particles; Any very small portion or part; the smallest portion; as, he has not a particle of patriotism or virtue; A word that has a particular grammatical function but does not obviously belong to any particular part of speech, such as the word to in English infinitives; A minute part or portion of matter; a morsel; a little bit; an atom; a jot; as, a particle of sand, of wood, of dust; The smaller hosts distributed in the communion of the laity; A crumb or little piece of concecrated host; In physics, a particle is a piece of matter smaller than an atom, for example an electron or a proton; {i} tiny portion, very small fragment; grain; preposition; conjunction; In grammar, a particle is a preposition such as `into' or an adverb such as `out' which can combine with a verb to form a phrasal verb. Higgs particle particle accelerator particle physics subatomic particle elementary particle W particle wave particle duality Z particle; part
particle accelerator: A device that accelerates electrically charged particles to extremely high speeds, for the purpose of inducing high energy reactions or producing high energy radiation
particle accelerators: plural form of particle accelerator
particle beam: A beam of atoms, ions or subatomic particles that has been accelerated by some device and collimated by magnets and/or electrostatic lenses
particle board: a structural material manufactured from wood particles (such as chips and shavings) by pressing, and binding through resin
particle boards: plural form of particle board
particle energies: plural form of particle energy
particle energy: The sum of a particle's potential energy, kinetic energy and rest energy
particle mechanics: The study of the motion of individual particles
particle physics: A branch of physics that studies the elementary constituents of matter and radiation, and the interactions between them
particle theory: atomic theory
Particle image velocimetry: Particle image velocimetry (PIV) is an optical method used to measure velocities and related properties in fluids. The fluid is seeded with particles which, for the purposes of PIV, are generally assumed to faithfully follow the flow dynamics. It is the motion of these seeding particles that is used to calculate velocity information
particle board: Material made in rigid sheets from compressed wood chips and resin and used for furniture and in buildings
particle swarm optimization: (Bilgisayar) Particle swarm optimization (PSO) is a stochastic, population-based computer problem-solving algorithm; it is a kind of swarm intelligence that is based on social-psychological principles and provides insights into social behavior, as well as contributing to engineering applications
particle accelerator: A particle accelerator is a machine used for research in nuclear physics which can make particles that are smaller than atoms move very fast. A device, such as a cyclotron or linear accelerator, that accelerates charged subatomic particles or nuclei to high energies. Also called atom smasher. a machine used in scientific studies which makes the very small pieces of matter that atoms are made of move at high speeds. Device that accelerates a beam of fast-moving, electrically charged atoms (ions) or subatomic particles. Accelerators are used to study the structure of atomic nuclei (see atom) and the nature of subatomic particles and their fundamental interactions. At speeds close to that of light, particles collide with and disrupt atomic nuclei and subatomic particles, allowing physicists to study nuclear components and to make new kinds of subatomic particles. The cyclotron accelerates positively charged particles, while the betatron accelerates negatively charged electrons. Synchrotrons and linear accelerators are used either with positively charged particles or electrons. Accelerators are also used for radioisotope production, cancer therapy, biological sterilization, and one form of radiocarbon dating
particle accelerator: machine that increases the speed of charged particles to a high rate using electrical energy fields
particle beam: A beam of atoms or subatomic particles that have been accelerated by a particle accelerating device, aimed by magnets, and focused by a lens
particle beam: a collimated flow of particles (atoms or electrons or molecules)
particle board: Plywood substitute made of course sawdust that is mixed with resin and pressed into sheets Used for closet shelving, floor underlayment, stair treads, etc
particle board: Sawdust and resin compressed into sheets that can substitute for plywood in many situations
particle board: A scientifically engineered wood that is extremely sound in structural integrity and consistent surface smoothness to allow the application of laminated materials The Alectra cabinetry line from Dura Supreme uses the furniture grade level of this engineered wood material for the cabinetry end panels, tops, bottoms and backs of every cabinet High-Pressure laminate and wood veneer materials are frequently applied to this material back to list
particle board: 5/8" Particle Board is standard decking material for rivet shelving Shelving can be ordered with or without Particle Board
particle board: Def - sheet stock that is composed of wood particles
particle board: board made from compressed wood chips and shavings
particle board: Sheets of building material made from wood particles bonded together with synthetic resin under heat and pressure
particle board: wallboard composed of wood chips or shavings bonded together with resin and compressed into rigid sheets
particle board: A wood product made from wood chips bonded with glue under heat and pressure Smooth surface particle board is dense, useful for both furniture and laminate jobs
particle physics: the branch of physics that studies subatomic particles and their interactions
particle physics: Particle physics is the study of the qualities of atoms and molecules and the way they behave and react. The branch of physics that deals with subatomic particles. the study of the way that parts of atoms develop and behave. or high-energy physics Study of the fundamental subatomic particles, including both matter (and antimatter) and the carrier particles of the fundamental interactions as described by quantum field theory. Particle physics is concerned with structure and forces at this level of existence and below. Fundamental particles possess properties such as electric charge, spin, mass, magnetism, and other complex characteristics, but are regarded as pointlike. All theories in particle physics involve quantum mechanics, in which symmetry is of primary importance. See also electroweak theory, lepton, meson, quantum chromodynamics, quark
God particle: The Higgs boson
J/psi particle: a subatomic particle with an unusually long lifetime and a large mass; a bound state of a charm quark and a anti-charm quark
Janus particle: A spherical microscopic particle which has hemispheres with sharply differing properties, such as one hydrophilic hemisphere and one hydrophobic hemisphere
Majorana particle: A particle that is its own antiparticle and thus capable of self-annihilation
Planck particle: A hypothetical particle having physical quantities on the Planck scale, most importantly being one Planck mass in mass. Sometimes also called a planckon
alpha particle: A positively charged nucleus of a helium-4 atom (consisting of two protons and two neutrons), emitted as a consequence of radioactivity
beta particle: An energetic electron or positron produced as the result of a nuclear reaction or nuclear decay
charged particle: any particle, especially a subatomic particle, that carries an electric charge
charged particle: an ion
composite particle: any particle that is not an elementary particle, namely hadrons, atomic nuclei, atoms and molecules
elementary particle: fundamental particle; any of the subatomic particles that does not consist of other, smaller particles; the gauge bosons, leptons and quarks
fundamental particle: any of the subatomic particles that does not consist of other, smaller particles; the gauge bosons, leptons and quarks
lambda particle: lambda baryon
nobiliary particle: a preposition found in names, indicating nobility
Claus von Amsberg.
subatomic particle: any of many units of matter smaller than an atom
ultrafine particle: A particle with diameter less than about 100 nanometers (nm)
upsilon particle: Any of a number of bound states of a heavy quark and its antiquark, especially that formed from a bottom quark and an anti-bottom quark
virtual particle: a particle that exists for a limited time and space, introducing uncertainty in their energy and momentum
wave-particle duality: The concept applying to all matter and radiation, but most evident in light and particles such as the electron, that properties of waves and of particles are exhibited simultaneously
weakly interacting massive particle: A hypothetical class of particle, proposed to explain the dark matter problem
β-particle: beta particle
smoothed particle hydrodynamics: Smoothed-particle hydrodynamics (SPH) is a computational method used for simulating fluid flows
B particle: Either of two subatomic particles in the meson family, one neutral and one positively charged, both of which have masses 10,331 times that of an electron and average lifetimes of 1.6 × 10- seconds
D particle: Either of two subatomic particles in the meson family, one neutral and one positively charged, having masses 3,649 and 3,658 times that of the electron and average lifetimes of 4.2 × 10- seconds, respectively
Higgs particle: or Higgs boson Carrier of an all-pervading fundamental field (Higgs field) that is hypothesized as a means of endowing mass on some elementary particles through its interactions with them. It was named for Peter W. Higgs born 1929 of the University of Edinburgh, one of those who first postulated the idea. The Higgs mechanism explains why the carriers of the weak force are heavy, while the carrier of the electromagnetic force has a mass of zero. There is no direct experimental evidence for the existence of either the Higgs particle or the Higgs field
W particle: Electrically charged subatomic particle that transmits the weak force, which governs radioactive decay (see radioactivity) in some atomic nuclei. The discovery of the W particle in 1983 by teams led by Carlo Rubbia and Simon van der Meer confirmed the electroweak theory, which explains that the electromagnetic force and the weak force are manifestations of the same interaction. The weak force is exchanged via three types of particles, two charged and one neutral. The charged particles are designated W^+ and W^- according to the sign of their charge, and the neutral particle is the Z particle. The W particle has a mass about 80 times that of the proton, which gives the weak force a very short range
Z particle: Electrically neutral carrier of the weak force and the neutral partner of the electrically charged W particle. It is nearly 100 times more massive than the proton and has a lifetime of only about 10^-25 second. Z particles were first observed in 1983 by Carlo Rubbia and Simon van der Meer at CERN. Further studies have shown a natural variation in mass that is related to the particle's lifetime through the uncertainty principle. Measurements show that when Z particles decay to neutrino-antineutrino pairs (see pair production), they produce only three types of lightweight neutrino, indicating that there are only three sets each of leptons and quarks
alpha particle: A helium-4 nucleus, especially when emitted from the nucleus of a radioactive atom
alpha particle: A positively charged particle, emitted by certain radioactive materials, made up of two neutrons and two protons bound together, hence identical with the nucleus of the helium atom; the least penetrating of the three common types of radiation (alpha, beta, gamma), it is stopped by a sheet of paper Not dangerous to plants, animals or humans unless the alpha-emitting substance has entered the body
alpha particle: A positively charged nuclear particle identical with the nucleus of a helium atom It consists of two protons and two neutrons and is ejected at high speed from the nucleus of an atom in certain radioactive transformations
alpha particle: A positively charged particle emitted from the nucleus of an atom having the same charge and mass as that of a helium nucleus (two protons and two neutrons)
alpha particle: A positively charged particle emitted in the radioactive decay of certain radioactive atoms An alpha particle is identical to the nucleus of the helium atom *
alpha particle: a positively charged particle that is the nucleus of the helium atom; emitted from natural or radioactive isotopes
alpha particle: A small electrically charged particle of very high velocity thrown off by many radioactive matierials, including uranium and radium It is identical with the nucleus of a helium atom and is made when an atom is fissioned Also see: Beta particle, Gamma rays
alpha particle: A positively-charged particle from the nucleus of an atom, emitted during radioactive decay
alpha particle: A positively charged particle consisting of two protons and two neutrons emitted by one of the radioactive elements An alpha particle is equivalent to an He2+ ion
alpha particle: A particle consisting of two protons and two neutrons, produced during alpha decay Identical to the nucleus of a 4He atom
alpha particle: helium nucleus emitted from a heavy radioactive element
alpha particle: The nuclei of a helium (with two neutrons and two protons each) that are discharged by radioactive decay of many heavy elements, such as uranium-238 and plutonium-239
alpha particle: A positively-charged particle from the nucleus of an atom, emitted during radioactive decay Alpha particles are helium nuclei, with 2 protons and 2 neutrons
alpha particle: Two neutrons and two protons bound as a single particle emitted from the nucleus of certain radioactive isotopes in the process of decay or disintegration
alpha particle: A particle emitted spontaneously from the nuclei of some radioactive elements It is identical with a helium nucleus, having a mass of four units and an electric charge of two positive units See Radioactivity
alpha particle: A positively charged particle emitted by certain radioactive materials [see radioactive materials definition] It is made up of two neutrons [see neutrons definition] and two protons [see protons definition] bound together and, hence, is identical to the nucleus of a helium atom It has low-penetrating power and short range The most energetic alpha particle will generally fail to penetrate the skin (Health Physics and Radiological Health Handbook Nuclear Lectern Associates, 1984 ) Back to Top
alpha particle: A positively charged particle, indistinguishable from a helium atom nucleus and consisting of two protons and two neutrons
alpha particle: A specific particle ejected from a radioactive atom It has low penetrating power and short range Alpha particles will generally fail to penetrate the skin Alpha-emitting atoms can cause health effects if introduced into the lungs or wounds
alpha particle: A particle from the nucleus of an atom with a positive charge that is emitted during radioactive decay They consist of helium nuclei with 2 protons and 2 neutrons
alpha particle: A 4He nucleus It is made up of two neutrons and two protons It is the least penetrating of the three common forms of radiation, being stopped by a thin sheet of paper It is not dangerous to living things unless the alpha-emitting substance is inhaled or ingested or comes into contact with the lens of the eye
alpha particle: A particle identical to the helium nucleus which has been ejected from the nucleus of an atom as a form of radiation When the alpha particle slows down it picks up two electrons, becoming an atom of helium The penetrating power of an alpha particle is low; a thin sheet of paper will stop most alpha particles The readjustment which takes place within the parent nucleus results in gamma radiation
alpha particle: A particle emitted from the nucleus of an atom, containing two protons and two neutrons, identical to the nucleus (without the electrons) of a helium atom
alpha particle: Helium nucleus: two protons, two neutrons, NO electrons Alpha particles are ions
alpha particle: Positively charged particle emitted by certain radioactive substances during their radioactive disintegration An alpha particle consists of two neutrons and two protons and is identical to the nucleus of a helium atom Alpha radiation is less penetrating than beta or gamma radiation A sheet of paper is sufficient to absorb alpha radiation
alpha particle: positively charged particle made up of two protons and two neutrons, nucleus of a helium atom
alpha particle: Charged particles emitted from a radioactive atom Each charged particle consists of two protons and two neutrons
alpha particle: A positively charged particle ejected spontaneously from the nuclei of some radioactive elements It is identical to a helium nucleus that has a mass number of 4 and an electrostatic charge of +2 It has low penetrating power and a short range (a few centimeters in air) The most energetic alpha particle will generally fail to penetrate the dead layers of cells covering the skin and can be easily stopped by a sheet of paper Alpha particles are hazardous when an alpha-emitting isotope is inside the body
alpha particle: The nuclei of a helium atom (with two neutrons and two protons each) that are discharged by radioactive decay of many heavy elements, such as uranium-238 and plutonium-239
beta particle: electron in a beta ray, high-speed electron or positron, electron or positron ejected from the nucleus of an atom during radioactive decay
beta particle: a high-speed electron or positron emitted in the decay of a radioactive isotope
beta particle: A high-speed electron or positron, especially one emitted in radioactive decay
charged particle: An elementary particle, such as a proton or electron, with a positive or negative electric charge
charged particle: small particle which carries an electrical charge
charmed particle: A particle with nonzero total charm
chi particle: An electrically neutral meson having a mass 6,687 times that of the electron and a mean lifetime of approximately 1.5 × 10- seconds
elementary particle: {i} subatomic particle, individual elemental particle that compose the whole atom
elementary particle: Any of the subatomic particles that compose matter and energy, especially one hypothesized or regarded as an irreducible constituent of matter. Also called fundamental particle. one of the types of pieces of matter including electrons, protons, and neutrons that make up atoms
elementary particle: a particle that is less complex than an atom; regarded as constituents of all matter
eta particle: An electrically neutral meson having a mass 1,071 times that of the electron and a mean lifetime of approximately 3.5 × 10- seconds
j particle: a neutral meson with a large mass
lambda particle: an electrically neutral baryon with isotopic spin 1
nobiliary particle: A preposition used as a mark of noble rank before a title or surname, as German von in Christian von Wolf and French de in Simone de Beauvoir
particles: The aggregate component of particleboard manufactured by mechanical means from wood These include all small sub-divisions of wood, such as chips, curls, flakes, sawdust, shavings, slivers, strands, wafers, wood flour, and wood wool
particles: A pixel-based particle generation system that simulates types of natural phenomena that contain many particles The particles system simulates particle dynamics by applying forces and recreating events, such as decay (disintegration) and obstacles, that affect natural particles This allows you to animate particle streams, such as sparks rising from a campfire, fireworks, or the tail of a comet trailing off into space
particles: Any solid or liquid matter larger than a molecule (less than 0 0002 micron diameter) It is composed of settleable matter (which will settle as dust within a reasonable period of time) and suspended matter (which remains suspended in the atmosphere until washed out by precipitation, deposited by impaction, or some other process)
particles: An extremely small piece of something
particles: A particle defines a point in space Particles are often animated and controlled by applying forces and other physics to them
particles: Subatomic and subnuclear objects with definite spins, masses and charges Fundamental (elementary) particles are those with no internal structure
particles: Very small bits of something
particles: plural of particle
particles: Fundamental units of matter and energy perihelion - The closest point to the sun in an orbit
small-particle pollution: air pollution caused by fine particles of soot (as from power plants or diesel engines)
strange particle: An unstable elementary particle created in high-energy particle collisions having a short life and a strangeness quantum number other than zero
strange particle: an elementary particle with non-zero strangeness
subatomic particle: {i} elementary particle, individual elemental particle that compose the whole atom
subatomic particle: Any of various units of matter below the size of an atom, including the elementary particles and hadrons. or elementary particle Any of various self-contained units of matter or energy. Discovery of the electron in 1897 and of the atomic nucleus in 1911 established that the atom is actually a composite of a cloud of electrons surrounding a tiny but heavy core. By the early 1930s it was found that the nucleus is composed of even smaller particles, called protons and neutrons. In the early 1970s it was discovered that these particles are made up of several types of even more basic units, named quarks, which, together with several types of leptons, constitute the fundamental building blocks of all matter. A third major group of subatomic particles consists of bosons, which transmit the forces of the universe. More than 200 subatomic particles have been detected so far, and most appear to have a corresponding antiparticle (see antimatter)
tau particle: {i} (Physics) tau lepton, tauon, negatively charged lepton having a mass almost 3500 times that of the electron (discovered by Martin Lewis Perl)
there's not a particle of truth in it: it is not true at all, that is completely false
upsilon particle: An electrically neutral meson having a mass 18,513 times that of the electron and a mean lifetime of approximately 8.0 × 10- seconds
virtual particle: A subatomic particle whose existence violates the principle of conservation of energy but is allowed to exist for a short time by Heisenberg's uncertainty principle
wave-particle duality: Principle that subatomic particles possess some wavelike characteristics, and that electromagnetic waves, such as light, possess some particlelike characteristics. In 1905, by demonstrating the photoelectric effect, Albert Einstein showed that light, which until then had been thought of as a form of electromagnetic wave (see electromagnetic radiation), must also be thought of as localized in packets of discrete energy (see photon). In 1924 Louis-Victor Broglie proposed that electrons have wave properties such as wavelength and frequency; their wavelike nature was experimentally established in 1927 by the demonstration of their diffraction. The theory of quantum electrodynamics combines the wave theory and the particle theory of electromagnetic radiation
weakly interacting massive particle: a hypothetical subatomic particle of large mass that interacts weakly with ordinary matter through gravitation; postulated as a constituent of the dark matter of the universe
without a particle of truth: without a bit of truth, not true at all