High Altitude, Low Opening. — a type of skydiving, where you leave the launch platform from a high altitude, and open the parachute at a very low altitude
When you have enough experience, you can do a HALO jump.
any of a variety of bright circles or arcs centered on the sun or moon, caused by the refraction or reflection of light by ice crystals suspended in the earth's atmosphere and exhibiting prismatic coloration ranging from red inside to blue outside
A metal ring used for patients with upper spinal cord injuries that surrounds or encircles the patient's head, allowing for proper alignment of the neck and spinal column
(n ) The region around a point in a mesh, whose values are used when updating the value of the central point In a cellular automata, the halo comprises those neighbouring cells whose values are used by the automaton's update rule
A luminous circle, usually prismatically colored, round the sun or moon, and supposed to be caused by the refraction of light through crystals of ice in the atmosphere
Acronym for High Altitude Low Opening Type of free fall military parachuting that entails exiting an airlift aircraft at high altitudes (up to 35,000 feet) and free falling to a low altitude (about 2,500 feet) before deploying the canopy The high altitude jump makes the airlift aircraft harder to shoot down and the low opening reduces the jumper's exposure to enemy observation and ground fire For its modern line, 21C has released a Special Forces HALO boxed figure and uniform set
(see galactic halo) halogens - A group of five nonmetallic elements, including fluorine, chlorine, bromine, iodine, and astatine heat - Energy that can move or transfer from one object to another because of a difference in temperature, resulting in a gain or loss of internal energy of particle motion helioseismology - The study of oscillations of the sun's photosphere that result from seismic events within the interior
An overlap region around a decomposed data subdomain that mirrors a set of data values on a neighbouring processor Used to reduce the amount of interprocessor communication in parallel application
Also known as nimbus or aureole, the nimbus is a ring of light surrounding the head of a holy person A square halo means that the person was still alive when the picture was made (for instance Pope Paschal I in the apse mosaic at Santa Cecilia)
(aka nimbus) A circle of radiant light around the heads of God, Christ, the Virgin Mary, or a saint A type of gloriole or glory It indicates divinity or holiness, though originally it was placed around the heads of kings and gods as a mark of distinction
The ring of light that seems to encircle the sun or moon when veiled by cirrus clouds To produce this phenomena, the ice crystals must be in a heterogeneous arrangement to refract the sunlight The most commonly observed is a halo that forms at a 22° radius, although another one at 46° radius may also be seen
"A solar flare event is called a 'Halo' event because the movies that are made show a full 'ring' of moving particles around the Sun's disk Because of this characteristic 'Halo' shape, we understand the particles to be moving in a direction towards the Earth " (Mike Kaiser)
A geological soil condition manifesting an effect known as "Metallurgical Phenomenon" A metallic halo is generated over time by the combination of acids and water in the soil leaching minute particles off a metal target into the surrounding soil
A ring of light In sign making, the effect achieved by reverse channel letters, which appear to be ringed by light because the light source is reflecting on the background from which the letters are pegged out