immunosuppressant

[ ĭm′yə-nō-sə-prĕsənt, ĭ-myōō′- ]

n.

An agent that suppresses the body's immune response.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.