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(1) The process, act or function of discharging or ejecting waste product of metabolism, especially from the system of an organism.

(2) The excreta, or the waste material eliminated by excretion.


Word origin: Latin excrētiōn- (s. of excrētiō) that which is sifted out.
Related forms: excrete (verb)

Compare: secretion

Retrieved from "http://www.biology-online.org/bodict/index.php?title=Excretion&oldid=96752"
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