stom·ach
n 1 a : a saclike expansion of the alimentary canal of a vertebrate communicating anteriorly with the esophagus and posteriorly with the duodenum and being typically a simple often curved sac with an outer serous coat, a strong complex muscular wall that contracts rhythmically, and a mucous lining membrane that contains gastric glands b : one of the compartments of a ruminant stomach <the abomasum is the fourth of a ruminant> 2 : a cavity in an invertebrate animal that is analogous to a stomach 3 : the part of the body that contains the stomach : BELLY, ABDOMEN .
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