noun \ˈkat-ˌsī\

: a jewel that has a pale stripe running down its middle which makes it look like the eye of a cat

: a marble with round circles that look like eyes

plural cat's–eyes

Full Definition of CAT'S-EYE

:  any of various gems (as a chrysoberyl or a chalcedony) exhibiting opalescent reflections from within
:  a marble with eyelike concentric circles

First Known Use of CAT'S-EYE

circa 1599


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