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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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