Hominids were a taxonomic family on Earth, part of the primates. Among the hominids were the chimpanzee,
gorilla and Human species.
On planets other than Earth, proto-hominids could develop. (TNG: "The Chase")
In 2370, Barclay's Protomorphosis Syndrome changed William T. Riker into one of the earlier hominids, specifically Australopithecine. (TNG: "Genesis")