Skip to Content
Medical Term:


Pronunciation: sim'be-o'sis


  1. The biologic association of two or more species.
  2. The mutual cooperation or interdependence of two people, such as mother and infant, or husband and wife; sometimes used to denote excessive or pathologic interdependence of two people.

[G. symbiosis, state of living together, fr. sym- + bios, life, + -osis, condition]

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.