noun
( plural cat's-eyes )
: any of various things resembling the eye of a cat: as
a. : any of various gems (as a chrysoberyl or a chalcedony) usually cut cabochon exhibiting opalescent reflections from within
b. : a child's marble (as an agate) light in color (as yellow) or with eyelike concentric circles
c. : the operculum of various turban shells of the Pacific islands and adjoining seas that is externally convex with a lustrous brightly colored central area surrounded by zones of white, ivory, and brown and is sometimes used for ornamentation