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c.1600, "gained by effort," past participle adjective from acquire. Of diseases, "occurring after birth, thus not dependent on heredity," 1842 (opposed to congenital). Acquired taste is attested from 1734.
acquired ac·quired (ə-kwīrd')
Of or relating to a disease, condition, or characteristic that is not congenital but develops after birth.
Developed in response to an antigen, as resistance to a disease by vaccination or previous infection.