stenosis

n. stricture, narrowing of a vessel or passage (Pathology)

A stenosis is an abnormal narrowing in a blood vessel or other tubular organ or structure. It is also sometimes called a "stricture" (as in urethral stricture). Stenoses of the vascular type are often associated with a noise (bruit) resulting from turbulent flow over the narrowed blood vessel. This bruit can be made audible by a stethoscope. Other, more reliable methods of diagnosing a stenosis are imaging methods including ultrasound, Magnetic Resonance Imaging/Magnetic Resonance Angiography, Computed Tomography/CT-Angiography which display anatomic imaging (i.e. the visible narrowing of a vessel) and/or flow phenomena (signs of the movement of the bodily fluid through the bodily structure).
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Stenosis /ste·no·sis/ pl. steno´ses [Gr.] stricture; an abnormal narrowing or contraction of a duct or canal. [more]Stenosis - Community and Resources

Noun
1. abnormal narrowing of a bodily canal or passageway
(synonym) stricture
(hypernym) pathology
(hyponym) aortic stenosis

n. stenosis, narrowing