Hetero vs. Homo

Heteroadjective

(informal) Heterosexual: of, pertaining to, or being a heterosexual person.

Heteronoun

(informal) A heterosexual person.

Homonoun

A human.

Homonoun

someone who practices homosexuality; having a sexual attraction to persons of the same sex

Homonoun

any living or extinct member of the family Hominidae

Homo

Homo (from Latin homō 'man') is the genus that emerged in the (otherwise extinct) genus Australopithecus that encompasses the extant species Homo sapiens (modern humans), plus several extinct species classified as either ancestral to or closely related to modern humans (depending on the species), most notably Homo erectus and Homo neanderthalensis. The genus emerged with the appearance of Homo habilis just over 2 million years ago.