n.
A localized, pathological, blood-filled dilatation of a blood vessel caused by a disease or weakening of the vessel's wall.
[Middle English aneurisme, ultimately from Greek aneurusma, from aneurein, to dilate : ana-, throughout; see ana- + eurus, wide.]
aneurysmal an'eu·rys'mal (-məl) adj.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
