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[hee-ma-toh-muh, hem-uh-] /ˌhi mæˈtoʊ mə, ˌhɛm ə-/
noun, plural hematomas, hematomata
[hee-ma-toh-muh-tuh, hem-uh-] /ˌhi mæˈtoʊ mə tə, ˌhɛm ə-/ (Show IPA).
a circumscribed collection of blood, usually clotted, in a tissue or organ, caused by a break in a blood vessel.
Origin of hematoma
1840-50; hemat- + -oma Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for hematoma
  • He then inserted a tube to drain the liquefied blood clot, known as a subdural hematoma.
  • The outlook depends on the size of the hematoma and the amount of brain swelling.
  • Brain tissue swelling and a hematoma within the brain put increased pressure on the brain and can eventually destroy it.
  • The bowel hematoma was noted in the wall of the terminal ileum after opening the peritoneum.
  • hematoma forming inside the wrist, because of internal hemorrhaging.
British Dictionary definitions for hematoma


/ˌhiːməˈtəʊmə; ˌhɛm-/
noun (pl) -mas, -mata (-mətə)
(pathol) a tumour of clotted or partially clotted blood
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 hematoma

1826, from hemato- + -oma.

Online Etymology Dictionary, © 2010 Douglas Harper
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hematoma in Medicine

hematoma he·ma·to·ma (hē'mə-tō'mə)
n. pl. he·ma·to·mas or he·ma·to·ma·ta (-mə-tə)
A localized swelling filled with blood resulting from a break in a blood vessel.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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hematoma in Science
Plural hematomas or hematomata (hē'mə-tō'mə-tə)
The abnormal buildup of blood in an organ or other tissue of the body, caused by a break in a blood vessel.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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