Definition of codeine noun from the Oxford Advanced Learner's Dictionary

 

codeine

 noun
noun
BrE BrE//ˈkəʊdiːn//
 
; NAmE NAmE//ˈkoʊdiːn//
 
[uncountable]
 
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a drug used to reduce pain Word Origin mid 19th cent.: from Greek kōdeia ‘poppy head’ + -ine.
See the Oxford Advanced American Dictionary entry: codeine