cat's eye

any of certain gems having a chatoyant luster, especially chrysoberyl.

a playing marble marked with eyelike concentric circles.

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

Also called: ataata a grazing marine gastropod, Turbo smaragdus, of New Zealand waters

trademark British a glass reflector set into a small fixture, placed at intervals along roads to indicate traffic lanes at night