• (a.) Pleochroic.
Ple·och`ro·mat'ic adjective Pleochroic. 
Type: Term Pronunciation: plē′ō-krō-mat′ik Definitions: 1. Relating to pleochromatism. Synonyms: pleochroic
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.