from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A small, lenticular, calcareous body, especially an operculum of a small shell of the family Tubinidae, used to remove a foreign substance from the eye.
- n. Eye agate.
from the GNU version of the Collaborative International Dictionary of English
- n. A small, lenticular, calcareous body, esp. an operculum of a small marine shell of the family Turbinidæ, 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.
- n. Eye agate. See under Eye.
from The Century Dictionary and Cyclopedia
- n. A small calcareous body, the operculum of small Turbinidæ, flat on one side and convex on the other, used for removing substances from between the eyelid and the eyeball.
eye + stone (Wiktionary)