noun.
The act of excreting.
noun.
The substance excreted, as sweat or urine, or certain juices in plants.
noun.
Synonyms Excretion, Secretion. Secretion is the more general word, and includes excretion. The latter is restricted to the elimination of useless or harmful substances from the body. Thus, the secretion of saliva or of milk would not be called excretion; but the latter term would be applied to the secretion of the urine. Both terms are applied to the products as well as to the functions.