EXAMPLES | WORD ORIGIN noun . Pathology a permanent cardiac or arterial dilatation usually caused by weakening of the vessel wall. Origin of aneurysm 1650–60;
dilation, equivalent to
(variant stem of
to dilate; see
Related forms 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. 2019
Examples from the Web for aneurysmal Historical Examples of aneurysmal British Dictionary definitions for aneurysmal noun a sac formed by abnormal dilation of the weakened wall of a blood vessel Derived Forms 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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Word Origin and History for aneurysmal n.
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
n. A localized, blood-filled dilation of a blood vessel caused by disease or weakening of the vessel wall. Related forms 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.
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.