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

 

diamorphine

 noun
noun
BrE BrE//ˌdaɪəˈmɔːfiːn//
 
; NAmE NAmE//ˌdaɪəˈmɔːrfiːn//
 
[uncountable]
 
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a powerful drug that is made from opium and used to reduce pain