Pronunciation: (BY-oh-LAH-jik AY-jent)
A substance that is made from a living organism or its products and is used in the prevention, diagnosis, or treatment of cancer and other diseases. Biologic agents include antibodies, interleukins, and vaccines. Also called biological agent and biological drug.
Source: NCI Dictionary of Cancer Terms2005-03-24 Date last modified: 2007-08-31