n. [ Pref. apo- + codeine. ] (Chem.) An alkaloid, C18H19NO2, prepared from codeine. In its effects it resembles apomorphine. [ Webster 1913 Suppl. ]
n. [ Gr. kw`deia poppy head: cf. F. codéine. ] (Chem.) One of the opium alkaloids; a white crystalline substance, C18H21NO3, similar to and regarded as a derivative of morphine, but much feebler in its action; -- called also codeia. [ 1913 Webster ]