单词	excretion
释义	excretion noun ex·​cre·​tion ik-ˈskrē-shən  1 : the act or process of excreting 2 : something excreted especially : metabolic waste products (such as urea and carbon dioxide) that are eliminated from the body Example Sentences The kidneys are organs of excretion. Recent Examples on the Web To contract monkeypox, your child would have to have skin to skin contact with an infected person for a prolonged period of time, touch a contaminated surface, or come into direct contact with an infected respiratory excretion like a sneeze. Rachel Reiff Ellis, Fortune, 2 Sep. 2022 Water snakes, like many snake species, will release a strong, musky odor from scent glands in their cloaca — an opening used for reproduction and excretion located near the base of the tail — when they are threatened or handled. Don Lyman, BostonGlobe.com, 13 July 2022 Both of these bone types (jawbones and pectoral fins) grow via the excretion of rows of osteoblasts (large cells responsible for the synthesis and mineralization of bone). Jennifer Ouellette, Ars Technica, 23 Feb. 2022 But how dog excretion affects nature reserves, which increasingly abut urban or populated areas, had yet to be analyzed. Washington Post, 7 Feb. 2022 Instead, it is caused by a mutation in an area between genes, resulting in the excretion of a toxic chemical that kills muscle cells. New York Times, 4 Nov. 2021 The virus spreads among common carp quickly by excretion or through the epidermis and gills. Minnah Arshad, Detroit Free Press, 18 Sep. 2021 Overall, study authors concluded that more research needed to be done regarding povidone iodine's effect on excretion and transmission of the SARS-CoV-2 virus. Ashley Abramson, Health.com, 17 Sep. 2021 Large boluses of food remain in the digestive tracts of competitive eaters for days before excretion. James M. Smoliga, Harper's Magazine, 22 June 2021 See More Word History First Known Use 1578, in the meaning defined at sense 1 Kids Definition excretion noun ex·​cre·​tion ik-ˈskrē-shən  1 : the act or process of separating and giving off cellular waste matter from the body excretion of urine 2 : waste material given off from the body Medical Definition excretion noun ex·​cre·​tion ik-ˈskrē-shən  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 digestive tract 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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