Search Result for "narcotic antagonist":
Wordnet 3.0

NOUN (1)

1. an antagonist used to counteract the effects of narcotics (especially to counteract the depression of respiration); 



WordNet (r) 3.0 (2006):

narcotic antagonist
    n 1: an antagonist used to counteract the effects of narcotics
         (especially to counteract the depression of respiration)