Pronunciation: (dī'krō-iz"um), [key]
1. Crystall.pleochroism of a uniaxial crystal such that it exhibits two different colors when viewed from two different directions under transmitted light.
2. Chem.the exhibition of essentially different colors by certain solutions in different degrees of dilution or concentration.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.