- clinical trial, clinical test - a rigorously controlled test of a new drug or a new invasive medical device on human subjects; in the United States it is conducted under the direction of the FDA before being made available for general clinical use
--1 is a kind of test, trial, run
--1 has particulars:phase I clinical trial, phase I; phase II clinical trial, phase II; phase III clinical trial, phase III; phase IV clinical trials, phase IV