A portion of the esophagus of either a bird or an annelid that contains ingested grit and is used to grind up ingested food before it is transferred to the stomach
a part of a bird's stomach that breaks down food into smaller pieces (guisier, from gigeria )
A stomach armed with chitinous or shelly plates or teeth, as in certain insects and mollusks
thick-walled muscular pouch below the crop in many birds and reptiles for grinding food
The second, or true, muscular stomach of birds, in which the food is crushed and ground, after being softened in the glandular stomach (crop), or lower part of the esophagus; the gigerium