Definition of Stenosis
Stenosis: A narrowing, as in:
aortic stenosis (narrowing of the aortic valve of the heart),
pulmonary stenosis (narrowing of the pulmonary
valve of the heart),
pyloric stenosis (narrowing of the outlet of the stomach), and
spinal stenosis (narrowing of the vertebral canal).
From the Greek "stenos" meaning narrow.
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