trichroism
noun
tri·chro·ism
ˌtrī-ˈkrō-ˌiz-əm 
: pleochroism in which the colors are unlike when a crystal is viewed in the direction of three different axes
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“Trichroism.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/trichroism. Accessed 31 Oct. 2025.
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