- Also called ventriculus. a thick-walled, muscular pouch in the lower stomach of many birds and reptiles that grinds food, often with the aid of ingested stones or grit.
- Also called gastric mill. a similar structure in the foregut of arthropods and several other invertebrates, often lined with chitin and small teeth.
- the innards or viscera collectively, especially the intestine and stomach.
- the thick-walled part of a bird’s stomach, in which hard food is broken up by muscular action and contact with grit and small stones
- a similar structure in many invertebrates
- informal the stomach and entrails generally
“stomach of a bird,” late 14c., from Old French gisier (Modern French gésier) “entrails, giblets (of a bird),” probably from Vulgar Latin *gicerium, dissimilated from Latin gigeria (neuter plural) “cooked entrails of a fowl,” a delicacy in ancient Rome, from PIE *yekwr- “liver” (see hepatitis). Parasitic -d added 1500s. Later extended to other animals, and, jocularly, to human beings.
- A muscular pouch behind the stomach in birds. It has a thick lining and often contains swallowed sand or grit, which helps in the mechanical breakdown of food.