WordNet (r) 3.0 (2006):

ketamine
    n 1: a general anesthetic and tranquilizer (not a barbiturate)
         that is administered intravenously or intramuscularly; used
         mainly by veterinarians or for minor surgery with geriatric
         or pediatric patients; taken in large doses it causes
         hallucinations similar to those associated with the use of
         PCP [syn: ketamine, ketamine hydrochloride, Ketalar]