A numerical integer invariant of an algebraic curve As applied to a topological object such as 2-dimensional manifold, it can be interpreted as the number of "handles" the object has E g a sphere has genus 0, while a torus (donut shape) has genus 1 There are various other definitions, such as the dimension of the space of differential (1-)forms
An inclusive, taxonomic category whose species have more characteristics in common with each other than with species of other genera within the same family
The unit of classification for a group of closely related plants In a plants botanical name, the genisus is identified by the first word in the full name; e g : Acer
An assemblage of species, having so many fundamental points of structure in common, that in the judgment of competent scientists, they may receive a common substantive name
A group of organisms (species) with common characteristics and an implied common ancestry Expressed in Latin, with the occasional Greek roots, as the first term of the binomial nomenclature of Genus species
1 In geometric topology, the number of holes of a surface Usually this means the maximum number of disjoint circles that can be drawn on the surface such that the complement is connected If there are no such circles, the surface is planar, and the genus then sometimes means the maximum number of disjoint arcs with the same property 2 A measure of the twistedness of a fiber bundle Technically, if X is a topological space with a fiber bundle F, it is the minimum number of open sets that cover X such that F is trivial over each open set 3 Some other number which generalizes or is analogous to the topological genus, such as the arithmetic genus of an algebraic curve
A taxonomic group comprising one or more species that are of common origin and are different from other taxonomic groups Similar genera are grouped in a family, which is the next level above the species
in biology, a category that's part of the scientific system for grouping together related plants, animals and other organisms (kingdom, phylum, class, order, family, genus, species) Genus is the category that ranks below a family and above a species
A group of related species The genus name is the first word in the scientific name of a species For example, the monarch's scientific name is Danaus plexippus Danaus is the name of the genus the monarch belongs to
A group in the classification of organisms Classification level above the species group It consists of similar species Similar genera (plural form of genus) are grouped into a family
The genus is the most closely related wider classification of a concept Animal is the genus of Man All men are animals but not all animals are men Genera is the plural form of Genus
A unit used in the classification of plants and animals It consists of a grouping of closely related SPECIES When the SCIENTIFIC NAME for a particular species is given the name of the genus (the 'generic name') is given first e g the lady's slipper orchid - Cypripedium calceolus - belongs to the genus called 'CYPRIPEDIUM'
An important rank in the taxonomic hierarchy which is subordinate to family but above the rank of species It is a group of obviously homogeneous species Collections of genera (plural) are grouped into families Large genera may be further subdivided into sections and series and even subgenera
A taxonomic category that designates a closely related and definable group of plants, including one or more species The name of the genus becomes the first word of the binomial employed in literature
"Genus" is the next to the lowest level of plant classification The lowest level is "species" All known living organisms are organized into a classification system This is part of the science called "taxonomy" Scientists refer to living things by a combined "genus" and "species" name, using Latin terms For example, people are called "Homo sapiens" A white pine would be called "Pinus strobus" A scientist anywhere in the world can look up information about any living organism by knowing the Latin or scientific name The genus name is always capitalized The species name is usually not capitalized The plural form of "genus" is "genera" [To return to previous page, click your browser's BACK button then scroll through the page to your last location]
A group of closely related species Ranks next above the species and next below the family The genus name is capitalized and immediately precedes the species name in a scientific description of an organism
Roughly speaking, this is the number of holes through a polyhedron (or other 3D object) A cube has genus 0, a doughnut has genus 1, and so on With many self-intersecting polyhedra, including many uniform polyhedra, it can be hard to say what the genus is just by looking at them, since the "holes" may not be apparent due to intersecting faces getting in the way
A genus is a class of similar things, especially a group of animals or plants that includes several closely related species. genera one of the groups into which scientists divide animals or plants, in which the animals or plants are closely related but cannot produce babies together. A genus includes fewer members than a family and more members than a species. Biological classification. It ranks below family and above species, consisting of structurally or phylogenetically (see phylogenetic tree) related species or a single species exhibiting unusual differences. For example, the species of roses collectively form the genus Rosa and those of horses, donkeys, and zebras form the genus Equus. The genus name, capitalized and usually italicized, is the first word of a scientific name in the system of binomial nomenclature
A class of objects divided into several subordinate species; a class more extensive than a species; a precisely defined and exactly divided class; one of the five predicable conceptions, or sorts of terms