gastric mill

/G AE1 S T R IH0 K M IH1 L/
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.

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