Wordnet 3.0
NOUN (1)
1. 
 a large clinical trial of a treatment or drug that in phase I and phase II has been shown to be efficacious with tolerable side effects; 
 after successful conclusion of these clinical trials it will receive formal approval from the FDA; 
[syn: phase III clinical trial, phase III]
WordNet (r) 3.0 (2006):
phase III clinical trial
    n 1: a large clinical trial of a treatment or drug that in phase
         I and phase II has been shown to be efficacious with
         tolerable side effects; after successful conclusion of
         these clinical trials it will receive formal approval from
         the FDA [syn: phase III clinical trial, phase III]