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A thin-walled, glandular stomach found in birds. It precedes the gizzard.

In Insects, the digestive chamber anterior to the stomach ; in Worms, that anterior to the gizzard ; in Birds, the glandular stomach anterior to the gizzard.

[Latin] In Insects, the digestive chamber anterior to the stomach; in Worms, that anterior to the gizzard; in Birds, the glandular stomach anterior to the gizzard (zool.).

A bulbous expansion at the termination of the oesophagus, immediately above the gizzard of birds, the walls of which are thickly studded with a layer of glands or follicles which secrete a digestive fluid.