aneurysm or an·eu·rism [ an-y uh-riz- uhm ] SHOW IPA / ˈæn yəˌrɪz əm / PHONETIC RESPELLING noun Pathology. a permanent cardiac or arterial dilatation usually caused by weakening of the vessel wall.
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Origin of aneurysm
dilation, equivalent to
(variant stem of
to dilate; see
OTHER WORDS FROM aneurysm an·eu·rys·mal, an·eu·ris·mal, adjective an·eu·rys·mal·ly, an·eu·ris·mal·ly, adverb
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022
How to use aneurysm in a sentence
Sometimes the arterial vessels are so dilated as to impart to the tumour an
aneurysmal pulsation and bruit.
It is possible to rupture a vessel, the walls of which are encrusted with lime salts, and full of small
aneurysmal dilatations. British Dictionary definitions for aneurysm noun a sac formed by abnormal dilation of the weakened wall of a blood vessel Derived forms of aneurysm aneurysmal, aneurismal, aneurysmatic or aneurismatic, adjective aneurysmally, aneurismally, aneurysmatically or aneurismatically, adverb Word Origin for aneurysm
C15: from Greek
aneurusma, from aneurunein to dilate, from eurunein to widen
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Medical definitions for aneurysm n. A localized, blood-filled dilation of a blood vessel caused by disease or weakening of the vessel wall. Other words from aneurysm an′eu•rys ( ′mal -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 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.