What does phase III clinical trial mean?
• PHASE III CLINICAL TRIAL (noun) The noun PHASE III CLINICAL TRIAL has 1 sense: 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 Familiarity information: PHASE III CLINICAL TRIAL used as a noun is very rare.