secretion

[si-kree-shuhn]
noun
1.
(in a cell or gland) the act or process of separating, elaborating, and releasing a substance that fulfills some function within the organism or undergoes excretion.
2.
the product of this act or process.

Origin:
1640–50; < Latin sēcrētiōn- (stem of sēcrētiō), equivalent to sēcrēt(us) (past participle of sēcernere to secern) + -iōn- -ion

secretionary [si-kree-shuh-ner-ee] , adjective
nonsecretion, noun
nonsecretionary, adjective
oversecretion, noun
supersecretion, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
secretion (sɪˈkriːʃən)
 
n
1.  a substance that is released from a cell, esp a glandular cell, and is synthesized in the cell
2.  the process involved in producing and releasing such a substance from the cell
 
[C17: from Medieval Latin sēcrētiō, from Latin: a separation; see secern]
 
se'cretionary
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

secretion
1646, from Fr. sécrétion, from L. secretionem (nom. secretio) "separation," from pp. stem of secernere "to separate, set apart" (see secret). The verb secrete in this sense is a back-formation first attested 1707.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

secretion se·cre·tion (sĭ-krē'shən)
n.

  1. The process of secreting a substance from a cell or gland.

  2. A substance, such as saliva, mucus, tears, bile, or a hormone, that is secreted.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
secretion   (sĭ-krē'shən)  Pronunciation Key 
  1. The process of secreting a substance from a cell or gland.

  2. A substance, such as saliva, mucus, tears, bile, or a hormone, that is secreted.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

secretion

in biology, production and release of a useful substance by a gland or cell; also, the substance produced. In addition to the enzymes and hormones that facilitate and regulate complex biochemical processes, body tissues also secrete a variety of substances that provide lubrication and moisture. Within an individual cell the Golgi apparatus and its associated secretory granules are thought to be the structures responsible for the production and release of secretory substances.

Learn more about secretion with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Many permanent or temporary conditions can reduce thyroid hormone secretion and
  cause hypothyroidism.
The relationship of calcium, arginine, and glucose to gastric inhibitory
  polypeptide augmentation of insulin secretion.
It is thought that they use their strong-smelling musk secretion to mark out
  territories.
Rhythmic secretion of melatonin then synchronizes other body functions to the
  day-night cycles in the environment.
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