buche

crop (pouch-like part of the alimentary tract of some birds); belly; mouthful

“La causa por que el Alicanto no puede volar, no reside en sus alas, que son perfectamente normales, sino en su buche, por la pesadez de los alimentos que ingiere.” — The reason that the Alicanto cannot fly is not to be found in its wings, which are perfectly normal, but in its crop, due to the heaviness of the foods it eats.

From Late Latin buccula, from Vulgar Latin *buccula, from Latin bucca. The form was influenced by Old French bouge (“small bag”).