parasitism

parasitism definition - medical

par·a·sit·ism (părˈə-sĭ-tĭzˌəm, -sī-)

noun
A symbiotic relationship in which one species, the parasite, benefits at the expense of the other, the host.

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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