stenosis

[sti-noh-sis]
noun Pathology.
a narrowing or stricture of a passage or vessel.

Origin:
1855–60; < Neo-Latin < Greek sténōsis. See steno-, -osis

stenotic [sti-not-ik] , adjective
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World English Dictionary
stenosis (stɪˈnəʊsɪs)
 
n , pl -ses
pathol an abnormal narrowing of a bodily canal or passage
 
[C19: via New Latin from Greek stenōsis, from stenoun to constrict, from stenos narrow]
 
stenotic
 
adj

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

stenosis ste·no·sis (stə-nō'sĭs)
n. pl. ste·no·ses (-sēz)
A constriction or narrowing of a duct or passage; a stricture.

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
Stroke secondary to carotid stenosis occurs when blood flow to the brain is
  blocked.
Mitral stenosis is a heart valve disorder that involves the mitral valve.
Pulmonary valve stenosis is a heart valve disorder that involves the pulmonary
  valve.
Renal artery stenosis is a narrowing or blockage of the artery that supplies
  blood to the kidney.
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