An organism, such as a bacterium, that can live in the absence as well as in the presence of atmospheric oxygen.
Outercourse and Other Trending Words This Week
Read more in this article about some frequently asked questions and fun facts related to our definitions.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.