|—n , pl genera, genuses|
|1.||biology any of the taxonomic groups into which a family is divided and which contains one or more species. For example, Vulpes (foxes) is a genus of the dog family (Canidae)|
|2.||logic a class of objects or individuals that can be divided into two or more groups or species|
|3.||a class, group, etc, with common characteristics|
|4.||maths a number characterizing a closed surface in topology equal to the number of handles added to a sphere to form the surface. A sphere has genus 0, a torus, genus 1, etc|
|[C16: from Latin: race]|
genus ge·nus (jē'nəs)
n. pl. gen·er·a (jěn'ər-ə)
A taxonomic category ranking below a family and above a species and generally consisting of a group of species exhibiting similar characteristics.
|genus (jē'nəs) Pronunciation Key
Plural genera (jěn'ər-ə)
A group of organisms ranking above a species and below a family. The names of genera, like those of species, are written in italics. For example, Periplaneta is the genus of the American cockroach, and comes from the Greek for "wandering about." See Table at taxonomy.