'Pleochroism' definitions:
Definition of 'pleochroism'
From: WordNet
noun
The phenomenon of different colors appearing when certain crystals are viewed from different directions
Definition of 'Pleochroism'
From: GCIDE
- Pleochroism \Ple*och"ro*ism\, n. [Gr.? mor? + ? color.] (Crystallog.) The property possessed by some crystals, of showing different colors when viewed in the direction of different axes. [1913 Webster]