Botany. the fundamental tissue of plants, composed of thin-walled cells able to divide.
Anatomy, Zoology. the specific tissue of an animal organ as distinguished from its connective or supporting tissue.
Zoology. a type of soft, spongy connective tissue of certain invertebrates, as the flatworms.
Pathology. the functional tissue of a morbid growth.

1645–55; < Neo-Latin < Greek parénchyma literally, something poured in beside, equivalent to par- par- + énchyma infusion; see en-2, chyme

parenchymal, parenchymatous [par-uhng-kim-uh-tuhs] , adjective
interparenchymal, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
parenchyma (pəˈrɛŋkɪmə)
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
[C17: via New Latin from Greek parenkhuma something poured in beside, from para-1 + enkhuma infusion]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

parenchyma pa·ren·chy·ma (pə-rěng'kə-mə)
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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American Heritage
Science Dictionary
parenchyma  [%PREMIUM_LINK%]     (pə-rěng'kə-mə)  Pronunciation Key 
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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Example sentences for parenchymatous
Each parenchymatous cell is isodiametric, spherical, or oval in shape.
Xylem parenchyma xylem parenchymatous cells are living cells present in xylem.
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