[irreg. f. Gr. χρῶμα color + -προπ-ος turning.] A magic-lantern slide consisting of two superposed circular glasses, brilliantly colored, one of which is made to rotate in front of the other.
1860. in Mayne, Expos. Lex.
c. 1865. J. Wylde, in Circ. Sc., I. 64/2. Chromotropes are … two pictures so arranged that they may revolve over each other on a common centre.
1874. trans. Lommel’s Light, 98. Phantasmagoric representation, dissolving views, chromatropes.
1876. E. W. Clark, Life in Japan, 175. After various well-known scenes … interspersed with curious revolving chromatropes.
