aboriginal (adj.)

1660s, "first, earliest, existing from the beginning," especially in reference to inhabitants of lands colonized by Europeans, from aborigines (see aborigine) + -al (1). The specific Australian sense is attested from 1820. The noun meaning "an original inhabitant, an autochthon" is attested from 1760. Related: Aboriginally; aboriginality (1848); aboriginalism (1859).