eyestone

[ ahy-stohn ]
/ ˈaɪˌstoʊn /
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noun

a small calcareous body, flat on one side and convex on the other, passed between the eye and the eyelid to bring out cinders or other foreign matter.

Origin of eyestone

First recorded in 1670–80; eye + stone
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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