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Medical Term:


Pronunciation: pi-lor'us, pi-lor'i


  1. The muscular tissue surrounding and controlling the aboral outlet of the stomach.
  2. A muscular or myovascular device to open (musculus dilator) and to close (musculus sphincter) an orifice or the lumen of an organ.

[L. fr. G. pyloros, a gatekeeper, the pylorus, fr. pyle, gate, + ouros, a warder]

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.