noun \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

:  the act or process of excreting
:  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



noun \ik-ˈskrē-shən\   (Medical Dictionary)

Medical Definition of EXCRETION

: the act or process of excreting
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


noun    (Concise Encyclopedia)

Bodily process for disposing of undigested food waste products and nitrogenous by-products of metabolism, regulating water content, maintaining acid-base balance, and controlling osmotic pressure to promote homeostasis. It refers to both urination and defecation and to the processes that take place in the digestive and urinary systems, as the kidney and liver filter wastes, toxins, and drugs from the blood and food reaches the last stage of digestion. Ammonia from protein digestion, the primary excretory product, is converted to urea to be excreted in urine.


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