NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,922 terms related to cancer and medicine.
Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.
- listen (... LAY-bel)
- Describes the legal use of a prescription drug to treat a disease or condition for which the drug has not been approved by the U.S. Food and Drug Administration.