NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,804 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.
- controlled clinical trial
- listen (kun-TROLD KLIH-nih-kul TRY-ul)
- A clinical study that includes a comparison (control) group. The comparison group receives a placebo, another treatment, or no treatment at all.