Kenneth G. Wilson (1923). The Columbia Guide to Standard American English. 1993.
aborigine, Aborigine, Aboriginal (nn.)
The lowercase noun refers to one of the original inhabitants of a region. Most Americans are probably aware that capitalized it specifically means one of the aboriginal inhabitants of Australia. Some may know that the preferred term is now Aboriginal. Pronounce the first two AB-uhr-IJ-uh-nee; the third AB-uhr-IJ-uh-nuhl.