odontophore
noun
a structure in the mouth of most mollusks over which the radula is drawn backward and forward in the process of breaking up food.
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The lingual ribbon and odontophoral apparatus have the structure which is typical for Glossophorous Mollusca.
From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" by Various