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diphenhydramine
noun
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How to pronounce diphenhydramine:

Definition of diphenhydramine:

diphenhydramine (noun):
an antihistamine c17h21no used especially in the form of its hydrochloride
noun. antihistamine (trade name Benadryl) used to treat allergic reactions involving the nasal passages (hay fever) and also to treat motion sickness.

Synonyms for diphenhydramine:

benadryl
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