commensal

commensal definition - medical

com·men·sal (kə-mĕnˈsəl)

adjective
Of, relating to, or characterized by a symbiotic relationship in which one species is benefited while the other is unaffected.
noun
An organism participating in a symbiotic relationship in which one species derives some benefit while the other is unaffected.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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