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eyestone

American  
[ahy-stohn] / ˈaɪˌstoʊn /

noun

  1. 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.

Etymology

Origin of eyestone

First recorded in 1670–80; eye + stone

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.