chromatrope

n. [ Gr. &unr_; color + &unr_; turn, rotation, &unr_; to turn. ] 1. (Physics) An instrument for exhibiting certain chromatic effects of light (depending upon the persistence of vision and mixture of colors) by means of rapidly rotating disks variously colored. [ 1913 Webster ]

2. A device in a magic lantern or stereopticon to produce kaleidoscopic effects. [ 1913 Webster ]