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Medical Term:


Pronunciation: ip'se-fakt


All parts or aspects of the environment that an individual, colony, population, or species of animal has modified chemically or physically by its own behavior (a nest or home, rodent or deer runs, excrement, pheromones).

[L. ipse, self, + factum, a thing done]

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