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or aneurism

[an-yuh-riz-uh m] /ˈæn yəˌrɪz əm/
noun, Pathology.
a permanent cardiac or arterial dilatation usually caused by weakening of the vessel wall.
Origin of aneurysm
1650-60; < Greek aneúrysma dilation, equivalent to aneurys- (variant stem of aneurýnein to dilate; see an-3, eury-) + -ma noun suffix
Related forms
aneurysmal, aneurismal, adjective
aneurysmally, aneurismally, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for aneurysmal
Historical Examples
  • aneurysmal varix may occur in the neck as a result of stabs or bullet wounds.

    Manual of Surgery Alexis Thomson and Alexander Miles
  • Sometimes the arterial vessels are so dilated as to impart to the tumour an aneurysmal pulsation and bruit.

    Manual of Surgery Alexis Thomson and Alexander Miles
British Dictionary definitions for aneurysmal


a sac formed by abnormal dilation of the weakened wall of a blood vessel
Derived Forms
aneurysmal, aneurismal, aneurysmatic, aneurismatic, adjective
aneurysmally, aneurismally, aneurysmatically, aneurismatically, adverb
Word Origin
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
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Word Origin and History for aneurysmal



early 15c., from Medieval Latin aneurisma, from Greek aneurysmos "dilation," from aneurynein "to dilate," from ana- "up" (see ana-) + eurynein "widen," from eurys "broad, wide," from PIE root *were- "wide, broad" (cf. Sanskrit uruh "broad, wide").

Online Etymology Dictionary, © 2010 Douglas Harper
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aneurysmal in Medicine

aneurysm an·eu·rysm or an·eu·rism (ān'yə-rĭz'əm)
A localized, blood-filled dilation of a blood vessel caused by disease or weakening of the vessel wall.

an'eu·rys'mal (-məl) or an'eu·ris·mat'ic (-māt'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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aneurysmal in Science
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 © 2002. Published by Houghton Mifflin. All rights reserved.
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