noun, plural: genera

(general) A class or group with common attributes.

(biology) A taxonomic category ranking used in biological classification that is below a family and above a species level, and includes group(s) of species that are structurally similar or phylogenetically related.


In binomial nomenclature, the genus is used as the first word of a scientific name. The genus name is always capitalized and italicized. In order for a genus to be descriptively useful, it must have monophyly, reasonable compactness, and distinctness.

Word origin: from Latin genus "descent, family, type, gender").

Related forms: generic (adjective).

See also:

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