cocarcinogen

[ kō′kär-sĭnə-jən, kō-kärsə-nə-jĕn′ ]

n.

A substance that works in combination with a carcinogen in the production of cancer.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.