Definition: A large, irregularly piriform sac between the esophagus and the small intestine, lying just inferior to the diaphragm; when distended it is 25–28 cm long and 10–10.5 cm in its greatest diameter, and has a capacity of about 1 L. Its wall has four coats or tunics: mucous, submucous, muscular, and peritoneal; the muscular coat is composed of three layers, the fibers running longitudinally in the outer, circularly in the middle, and obliquely in the inner layer.
Synonym(s): gaster1TA, ventriculus1TA
[G. stomachos, L. stomachus]
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Examples: glitazone, GI cocktail, etc.