Definitions for "Dichroism"
The property of presenting different colors by transmitted light, when viewed in two different directions, the colors being unlike in the direction of unlike or unequal axes.
Literally means "two colors". A mineral that exhibits one color when viewed from one angle but a different color when viewed from a different angle is said to display dichroism.
The appearance of one color in relfected light and another with tranmitted light. Such as with gold fuming, the glass has a metallic gold appearance in reflected light, but appears blue, pink, or violet from light shining through it from the back. Reference to glass that shows different colors from different lighting.