OXFORD DICTIONARY
aborigine, n. (usu. in pl.)
1 an aboriginal inhabitant.
2 (usu. Aborigine) an aboriginal inhabitant of Australia.
Aboriginal is preferred, esp. in the singular.
3 an aboriginal plant or animal.
back-form. f. pl. aborigines f. L, prob. f. phr. ab origine from the beginning
THESAURUS
aborigine
Bronze Age man, Hominidae, Iron Age man, Stone Age man, aboriginal, ancient, antediluvian, anthropoid, ape-man, autochthon, bushman, cave dweller, caveman, earliest inhabitant, first comer, fossil man, hominid, humanoid, indigene, local, local yokel, man of old, missing link, native, preadamite, prehistoric man, prehuman, primate, primitive, primitive settler, protohuman, troglodyte