Wordnet 3.0
NOUN (1)
1. 
 tranquilizer (trade name Ativan) used to treat anxiety and tension and insomnia; 
[syn: lorazepam, Ativan]
WordNet (r) 3.0 (2006):
Ativan
    n 1: tranquilizer (trade name Ativan) used to treat anxiety and
         tension and insomnia [syn: lorazepam, Ativan]