clinical trial

the scientific investigation of a new treatment that has shown some benefit in animal or laboratory studies, but that has not yet been proven effective in humans. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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clinical trial

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 
WordNet® 3.0, © 2006 by Princeton University.
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Example sentences
To claim that people should risk themselves, out of beneficence, to participate
  in a clinical trial is unreasonable.
The system essentially functions as a clinical trial in a test tube.
The efficacy of such a program would be easy to test in an educational clinical
  trial costing no more than a few million dollars.
The drug will be tested in a large multi-center clinical trial to see whether
  it meets its endpoints in humans.
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