| pylorus | <anatomy> The opening in a vertebrate from the stomach into the intestine. Origin: Gr. Pyloros = gatekeeper (18 Nov 1997) |
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| sphincter muscle of pylorus | A thickening of the circular layer of the gastric musculature encircling the gastroduodenal junction. Synonym: musculus sphincter pylori, sphincter muscle of pylorus. (05 Mar 2000) |
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| dilator muscle of pylorus | The longitudinal muscular fibres that open the gastroduodenal junction. Synonym: musculus dilator pylori gastroduodenalis. (05 Mar 2000) |