NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,800 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.
- photodynamic therapy
- listen (FOH-toh-dy-NA-mik THAYR-uh-pee)
Treatment with drugs that become active when exposed to light. These activated drugs may kill cancer cells.