'Codeine' definitions:
Definition of 'codeine'
From: WordNet
noun
Derivative of opium; used as an antitussive (to relieve coughing) and an analgesic (to relieve pain)
Definition of 'Codeine'
From: 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]