"adopt and assimilate an alien culture," 1925 (implied in acculturated), a back-formation from acculturation (q.v.). Acculturize was used from 1895. Related: Acculturating.
Entries linking to acculturate
acculturation n.
"the adoption and assimilation of an alien culture" [OED], 1880, from assimilated form of ad- "to" + culture (n.) + noun ending -ation.