[ zen-uh-bahy-ot-ik, -bee-, zee-nuh- ]
/ ˌzɛn ə baɪˈɒt ɪk, -bi-, ˌzi nə- /


a chemical or substance that is foreign to an organism or biological system.


Discover The Influence Of Portuguese On English Via This Quiz!
We’ve gathered some interesting words donated to English from Portuguese … as well as some that just don’t translate at all. Do you know what they mean?
Question 1 of 11
Which of the following animal names traces its immediate origin to Portuguese?

Origin of xenobiotic

First recorded in 1915–20; xeno- + biotic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Medical definitions for xenobiotic

[ zĕn′ə-bī-ŏtĭk, zē′nə- ]


Foreign to the body or to living organisms. Used of chemical compounds.


A xenobiotic chemical.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.