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  • WordNet 3.6
    • n trichroism pleochroism of a crystal so that it exhibits three different colors when viewed from three different directions
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Webster's Revised Unabridged Dictionary
    • n Trichroism (Min) The quality possessed by some crystals of presenting different colors in three different directions.
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Century Dictionary and Cyclopedia
    • n trichroism In biology, trimorphism in the coloring of a species.
    • n trichroism The property possessed by some crystals of exhibiting different colors in three different directions when viewed by transmitted light. It is due to the different degrees of absorption in the three directions. The more general term pleochroism is often employed.
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Webster's Revised Unabridged Dictionary
Pref. tri-, + Gr. color: cf. F. trichroïsme,