symbiosis

symbiosis definition - medical

sym·bi·o·sis (sĭmˌbē-ōˈsĭs, -bī-)

noun pl. sym·bi·o·ses (-sēz)
  1. A close, prolonged association between two or more different organisms of different species that may, but does not necessarily, benefit each member.
  2. A relationship of mutual benefit or dependence.

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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