[ koh-ahrk-tey-shuh n ]
/ ˌkoʊ ɑrkˈteɪ ʃən /


  1. a narrowing of the lumen of a blood vessel.
  2. a congenital anomaly of the heart in which there is a narrowing of the aorta, resulting in abnormal blood flow.
Entomology. the condition of having the body enclosed in a hardened shell or puparium.

Origin of coarctation

1400–50; late Middle English coartacioun pressure, constriction < Latin coar(c)tātiōn-, stem of coar(c)tātiō; see coarctate, -ion Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for coarctation


[ kō′ärk-tāshən ]


A constriction, stricture, or stenosis.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.