eugenicist [yoo-jen-uh-sist] Word Origin noun a specialist in eugenics. an advocate of eugenic measures. Also eu·ge·nist [yoo-juh-nist, yoo-jen-ist] /ˈyu dʒə nɪst, yuˈdʒɛn ɪst/. Origin of eugenicist First recorded in 1905–10; eugenic + -ist