n.
Pronunciation: ( ˌ )k ō - ˌ ärk- ' t ā -sh ə n
Function: noun
Etymology: Latin coarctation-, coarctatio tightening, from coarctare, coartare to constrict, from co- + artare to fix firmly, from artus close, tight; akin to Latin artus joint ― more at ARTICLE
Date: 1545
: a stricture or narrowing especially of a canal or vessel (as the aorta)