Benadryl Benadryl /ˈbɛnədrɪl/

noun

1. Antihistamine (trade name Benadryl) used to treat allergic reactions involving the nasal passages (hay fever) and also to treat motion sickness  ( Benadryl , diphenhydramine )
   antihistamine (trade name Benadryl) used to treat allergic reactions involving the nasal passages (hay fever) and also to treat motion sickness