A conical calcareous fossil, tapering to a point at the lower extremity, with a conical cavity at the other end, where it is ordinaril…
Its definition shares important concepts with this word: small, lenticular, calcareous, body, operculum.
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Eyestone
A small, lenticular, calcareous body, esp. an operculum of a small marine shell of the family Turbinidae, used to remove a foreign substance from the eye. It is put into the inner corner of the eye under the lid, and allowed to work its way out at the outer corner, bringing with it the substance.
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