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[ih-dee-muh] /ɪˈdi mə/
noun, plural edemas, edemata
[ih-dee-muh-tuh] /ɪˈdi mə tə/ (Show IPA).
effusion of serous fluid into the interstices of cells in tissue spaces or into body cavities.
Plant Pathology.
  1. a small surface swelling of plant parts, caused by excessive moisture.
  2. any disease so characterized.
Origin of edema
1490-1500; < New Latin oedēma < Greek oídēma a swelling, equivalent to oidē- (variant stem of oideîn to swell) + -ma noun suffix
Related forms
[ih-dem-uh-tuh s, ih-dee-muh-] /ɪˈdɛm ə təs, ɪˈdi mə-/ (Show IPA),
[ih-dem-uh-tohs, ih-dee-muh-] /ɪˈdɛm əˌtoʊs, ɪˈdi mə-/ (Show IPA),
pseudoedema, noun, plural pseudoedemata. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for edema


noun (pl) -mata (-mətə)
the usual US spelling of oedema
Derived Forms
edematous (ɪˈdɛmətəs), edematose, adjective


noun (pl) -mata (-mətə)
(pathol) an excessive accumulation of serous fluid in the intercellular spaces of tissue
(plant pathol) an abnormal swelling in a plant caused by a large mass of parenchyma or an accumulation of water in the tissues
Derived Forms
oedematous, edematous (ɪˈdɛmətəs), oedematose, edematose, adjective
Word Origin
C16: via New Latin from Greek oidēma, from oidein to swell
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 edema

c.1400, from medical Latin, from Greek oidema (genitive oidematos) "a swelling tumor," from oidein "to swell," from oidos "tumor, swelling," from PIE *oid- "to swell;" cf. Latin aemidus "swelling," Armenian aitumn "a swelling," Old Norse eista "testicle," Old English attor "poison" (that which makes the body swell), and the first element in Oedipus.

Online Etymology Dictionary, © 2010 Douglas Harper
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edema in Medicine

edema e·de·ma (ĭ-dē'mə)
n. pl. e·de·mas or e·de·ma·ta (-mə-tə)
An accumulation of an excessive amount of watery fluid in cells, tissues, or serous cavities.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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edema in Science
An accumulation of an excessive amount of watery fluid in cells, tissues, or body cavities. Edema can be mild and benign as in pregnancy or prolonged standing in the elderly, or a serious sign of heart, liver, or kidney failure, or of other diseases.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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