You searched for: “pleochromatic
pleochroic, pleochromatic, pleochroous
1. Showing different colors when viewed from different directions.
2. A reference to a crystal showing different colors when viewed by light polarized in different directions.
pleochromatic
The property possessed by some crystals of transmitting one color in one position and the complementary color in a position at right angles to the first; pleochromatism.