from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Foreign to the body or to living organisms. Used of chemical compounds.
- n. A xenobiotic chemical, such as a pesticide.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of or pertaining to xenobiosis.
- adj. Relating to a substance foreign to the body or ecological system.
- n. Any foreign compound not produced by an organism's metabolism
xeno- + biotic (Wiktionary)