Definition of polychroic in English:
polychroic
Pronunciation /ˌpɒlɪˈkrəʊɪk/
adjective
rare Multicoloured; (in Crystallography and Mineralogy) = "pleochroic".
Origin
Mid 19th century; earliest use found in Louis Legrand Noble (1813–1882). From ancient Greek πολύχροος + -ic.