coarctation

[koh-ahrk-tey-shuhn]
noun
1.
Pathology.
a.
a narrowing of the lumen of a blood vessel.
b.
a congenital anomaly of the heart in which there is a narrowing of the aorta, resulting in abnormal blood flow.
2.
Entomology. the condition of having the body enclosed in a hardened shell or puparium.

Origin:
1400–50; late Middle English coartacioun pressure, constriction < Latin coar(c)tātiōn-, stem of coar(c)tātiō; see coarctate, -ion

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World English Dictionary
coarctate (kəʊˈɑːkteɪt)
 
adj
1.  (of a pupa) enclosed in a hard barrel-shaped case (puparium), as in the housefly
2.  crowded or pressed together; constricted
 
vb
3.  pathol (esp of the aorta) to become narrower; become constricted
 
[C15: from Latin coarctāre, to press together, from artus tight]
 
coarc'tation
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

coarctation co·arc·ta·tion (kō'ärk-tā'shən)
n.
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.
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Example sentences
There are many ways to repair coarctation of the aorta.
Coarctation of the aorta is a birth defect that causes narrowing of the aorta, the main artery of the heart.
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