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aneurysm

or an·eu·rism

[ an-yuh-riz-uhm ]
/ ˈæn yəˌrɪz əm /
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noun Pathology.

a permanent cardiac or arterial dilatation usually caused by weakening of the vessel wall.

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Origin of aneurysm

1650–60; <Greek aneúrysma dilation, equivalent to aneurys- (variant stem of aneurýnein to dilate; see an-3, eury-) + -ma noun suffix
an·eu·rys·mal, an·eu·ris·mal, adjectivean·eu·rys·mal·ly, an·eu·ris·mal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for aneurysm

aneurysm

aneurism

/ (ˈænjəˌrɪzəm) /

noun

a sac formed by abnormal dilation of the weakened wall of a blood vessel
aneurysmal, aneurismal, aneurysmatic or aneurismatic, adjectiveaneurysmally, aneurismally, aneurysmatically or aneurismatically, adverb
C15: from Greek aneurusma, from aneurunein to dilate, from eurunein to widen
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

Medical definitions for aneurysm

aneurysm

n.

A localized, blood-filled dilation of a blood vessel caused by disease or weakening of the vessel wall.
an′eu•rysmal (-məl) null adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for aneurysm

aneurysm
[ ănyə-rĭz′əm ]

A localized, blood-filled dilation of a blood vessel or cardiac chamber caused by disease, such as arteriosclerosis, or weakening of the vessel or chamber wall. A ruptured aneurysm results in hemorrhage and is often fatal.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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