Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. A ring of smooth muscle fibers around the opening of the stomach into the duodenum.
Wiktionary
- n. anatomy Muscular valve connecting the stomach to the duodenum and regulating flow of materials out of the stomach.
WordNet 3.0
- n. the sphincter muscle of the pylorus that separates the stomach from the duodenum
Examples
“Emetine creates nausea within five to eight minutes; pilocarpine contracts the pyloric sphincter and inhibits the emptying of the stomach into the duodenum; and ephedrine controls blood pressure fluctuations.”
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