genus /ˈdʒiːnəs/ noun6 •A category in the classification of organisms, ranking below family (Lat. familia) and above species.All magnolias belong to the genus Magnolia.Other species of the genus Bos are often called cattle or wild cattle. •A taxon at this rank.In most cases, at subsequent mentions of the binomial name you can abbreviate the genus with no danger of confusing the reader. •A group with common attributes.Recollection is one of a whole genus of effects which are more or less peculiar to the phenomena that we naturally call "mental." — 1945 •Within a definition, a broader category of the defined concept. •A natural number representing any of several related measures of the complexity of a given manifold or graph. •A type of tuning or intonation, used within an Ancient Greek tetrachord. formsgenera · genii · genuses · genusses