Pylorus

n. opening between the stomach and the duodenum (Anatomy)

The pylorus (from Greek πυλωρος = "gate guard") is the region of the stomach that connects to the duodenum. It is divided in two parts: the pyloric antrum, which connects to the body of the stomach.the pyloric canal, which connects to the duodenum. The pyloric sphincter, or valve, is a strong ring of smooth muscle at the end of the pyloric canal and lets food pass from the stomach to the duodenum. It receives sympathetic innveration from celiac ganglion.
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Pylorus /py·lo·rus/ the distal aperture of the stomach, opening into the duodenum; variously used to mean pyloric part of the stomach, and pyloric [more]Pylorus - Community and Resources

Noun
1. a small circular opening between the stomach and the duodenum
(hypernym) orifice, opening, porta
(part-meronym) pyloric sphincter, pyloric valve, musculus sphincter pylori

n. pylorus, opening between the stomach and the duodenum (Anatomy)