Chrō'ma-trōpe, n.

n. [Gr. χρῶμα, color, and τροπή, turn, rotation, from τρέπειν, to turn.] A philosophical toy, a modification of the phenakistoscope, consisting of a disk, on which circular arcs of brilliant colors are inscribed in pairs passing through the center of motion, each pair intersecting the following in a slightly different manner from the preceding one, so that when it is made to revolve rapidly, it presents the appearance of streams of beautiful colors flowing either to or from the center, according to the direction of rotation of the disk.