codeine Meaning, Definition & Usage

  1. noun derivative of opium; used as an antitussive (to relieve coughing) and an analgesic (to relieve pain)

WordNet

Co*de"ine noun
Etymology
Gr. poppy head: cf. F. codine.
Definitions
  1. (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.

Webster 1913