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parenchyma

[puh-reng-kuh-muh] /pəˈrɛŋ kə mə/
noun
1.
Botany. the fundamental tissue of plants, composed of thin-walled cells able to divide.
2.
Anatomy, Zoology. the specific tissue of an animal organ as distinguished from its connective or supporting tissue.
3.
Zoology. a type of soft, spongy connective tissue of certain invertebrates, as the flatworms.
4.
Pathology. the functional tissue of a morbid growth.
Origin
1645-1655
1645-55; < Neo-Latin < Greek parénchyma literally, something poured in beside, equivalent to par- par- + énchyma infusion; see en-2, chyme
Related forms
parenchymal, parenchymatous
[par-uh ng-kim-uh-tuh s] /ˌpær əŋˈkɪm ə təs/ (Show IPA),
adjective
interparenchymal, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for parenchyma
  • Xylem parenchyma xylem parenchymatous cells are living cells present in xylem.
  • Inflammatory foci are separated by normal, aerated parenchyma.
British Dictionary definitions for parenchyma

parenchyma

/pəˈrɛŋkɪmə/
noun
1.
unspecialized plant tissue consisting of simple thin-walled cells with intervening air spaces: constitutes the greater part of fruits, stems, roots, etc
2.
animal tissue that constitutes the essential or specialized part of an organ as distinct from the blood vessels, connective tissue, etc, associated with it
3.
loosely-packed tissue filling the spaces between the organs in lower animals such as flatworms
Derived Forms
parenchymatous (ˌpærɛŋˈkɪmətəs) adjective
Word Origin
C17: via New Latin from Greek parenkhuma something poured in beside, from para-1 + enkhuma infusion
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for parenchyma
n.

1650s, Modern Latin, from Greek parenkhyma "something poured in beside," from para- "beside" (see para- (1)) + enkhyma "infusion," from en- "in" + khein "to pour" (see found (v.2)). In ancient physiology, the stuff that was supposed to make up the liver, lungs, etc., which was believed to be formed from blood strained through the capillaries and congealed.

Online Etymology Dictionary, © 2010 Douglas Harper
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parenchyma in Medicine

parenchyma pa·ren·chy·ma (pə-rěng'kə-mə)
n.
The distinguishing cells of a gland or organ, contained in and supported by the stroma.


pa·ren'chy·mal or par'en·chym'a·tous (pār'ěn-kĭm'ə-təs) adj.
par'en·chym'a·tous·ly adv.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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parenchyma in Science
parenchyma
  (pə-rěng'kə-mə)   
The basic tissue of plants, consisting of cells with thin cellulose walls. The cortex and pith of the stem, the internal layers of leaves, and the soft parts of fruits are made of parenchyma. In contrast to sclerenchyma cells, parenchyma cells remain alive at maturity. They perform various functions, such as water storage, replacement of damaged tissue, and physical support of plant structures. Chloroplasts, the organelles in which photosynthesis takes place, are found in parenchyma cells. Compare collenchyma, sclerenchyma.

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