Gastric mill

noun

Definitions

Noun
  1. 1
    An organ in the gastrointestinal tract of some animals, particularly crustaceans, which contains dentition, that is used to grind food. The gnashing of the teeth/plates in the mill is also used by some of the creatures to create audible growling, as a form of communication.
  2. 2
    thick-walled muscular pouch below the crop in many birds and reptiles for grinding food wordnet

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