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| 1. | (Anat.) 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. | ||||||||||
| 2. | (Zool.) A thick muscular stomach found in many invertebrate animals.
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| Noun | 1. | gizzard - thick-walled muscular pouch below the crop in many birds and reptiles for grinding food Synonyms: gastric mill, ventriculus |