Dictionary

excretion

noun ex·cre·tion \ik-ˈskrē-shən\

: the act or process of passing waste from the body : the process of excreting waste

: waste passed from the body : excreted matter

Full Definition of EXCRETION

1
:  the act or process of excreting
2
:  something excreted; especially :  metabolic waste products (as urea and carbon dioxide) that are eliminated from the body

Examples of EXCRETION

  1. The kidneys are organs of excretion.

First Known Use of EXCRETION

1578

excretion

noun ex·cre·tion \ik-ˈskrē-shən\   (Medical Dictionary)

Medical Definition of EXCRETION

1
:  the act or process of excreting
2
a :  something eliminated by the process of excretion that is composed chiefly of urine or sweat in mammals including humans and of comparable materials in other animals, characteristically includes products of protein degradation (as urea or uric acid), usually differs from ordinary bodily secretions by lacking any further utility to the organism that produces it, and is distinguished from waste materials (as feces) that have merely passed into or through the alimentary canal without being incorporated into the body proper b :  a waste product (as urine, feces, or vomit) eliminated from an animal body :  excrement—not used technically

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