The Collaborative International Dictionary
Chromatrope
Chromatrope \Chro"ma*trope\, n. [Gr. ? color + ? turn, rotation, ? to turn.]
(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.
A device in a magic lantern or stereopticon to produce kaleidoscopic effects.
Wiktionary
chromatrope
n. An instrument for exhibiting certain chromatic effects of light by means of rapidly rotating disks of various colours.