Also found in: Dictionary, Encyclopedia.
A commensal organism that lives on the outer body surface of another organism.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
ectocommensal(of an organism) living as a COMMENSAL on the body surface of another.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005