Dictionary.com
definitions

cat's-eye

[kats-ahy]
noun, plural cat's-eyes.
  1. any of certain gems having a chatoyant luster, especially chrysoberyl.
  2. a playing marble marked with eyelike concentric circles.

Origin of cat's-eye

First recorded in 1545–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for cat's-eye

cat's-eye

noun
  1. any of a group of gemstones, esp a greenish-yellow variety of chrysoberyl, that reflect a streak of light when cut in a rounded unfaceted shape
  2. Also called: ataata a grazing marine gastropod, Turbo smaragdus, of New Zealand waters
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012