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excretion (n.)

c. 1600, "action of excreting;" 1620s, "that which is excreted," from French excrétion (16c.), from Latin excretionem (nominative excretio), noun of action from past-participle stem of excernere "to sift out, separate" (see excrement).

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Definitions of excretion from WordNet

excretion (n.)
the bodily process of discharging waste matter;
Synonyms: elimination / evacuation / excreting / voiding
excretion (n.)
waste matter (as urine or sweat but especially feces) discharged from the body;
Synonyms: body waste / excreta / excrement / excretory product
From wordnet.princeton.edu