Source : Webster's Revised Unabridged Dictionary (1913)

Stenosis \Ste*no"sis\, n. [NL., fr. Gr. ? narrow.] (Med.)
   A narrowing of the opening or hollow of any passage, tube, or
   orifice; as, stenosis of the pylorus. It differs from
   stricture in being applied especially to diffused rather than
   localized contractions, and in always indicating an origin
   organic and not spasmodic.

Source : WordNet®

stenosis
     n : abnormal narrowing of a bodily canal or passageway [syn: {stricture}]
     [also: {stenoses} (pl)]