stomach

stom·ach

noun \ˈstəm-ək, -ik\

Definition of STOMACH

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 stomach 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

Illustration of STOMACH