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

 

antihistamine

 noun
noun
BrE BrE//ˌæntiˈhɪstəmiːn//
 
; NAmE NAmE//ˌæntiˈhɪstəmiːn//
 
[countable, uncountable]
 
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a drug used to treat allergies, especially hay fever antihistamine cream/injections/shots
See the Oxford Advanced American Dictionary entry: antihistamine