a free commensal organism.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
A facultative commensal organism that can sustain itself apart from its usual host.
[G. koinos, common, + sitos, food]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012