C18H21NO3

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Codeine \Co"deine\ (k[=o]"d[=e]n or k[-o]*d[=e]"[i^]n), n. [Gr.
     kw`deia poppy head: cf. F. cod['e]ine.] (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]