1. (n.) 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.

2. (n.) 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 genus is not necessarily the lowest definable group of species, for it may often be divided into several subgenera. In proportion as its definition is exact, it is natural genus; if its definition can not be made clear, it is more or less an artificial genus.

antonomasia binomial nomenclature biosystematics biosystematy biotype blood branch brand breed cast character clan class classification color denomination description designation family feather form genotype genre glossology grain ilk kidney kin kind kingdom label line lot make manner mark mold nature nomenclature number onomastics onomatology order orismology persuasion phylum place-names place-naming polyonymy race section series shape sort species stamp strain stripe style subclass subfamily subgenus subkingdom suborder subspecies subtribe superclass superfamily superorder superspecies systematics taxonomy terminology the like of the likes of toponymy tribe trinomialism type variety