indicatrix
noun
in·dica·trix
¦ində̇¦kā‧triks,
ə̇nˈdikə‧(ˌ)t-
plural -es
: an ellipsoid whose axes are proportional to the principal refractive indices of a crystal and from which various optical properties of the crystal may be deduced
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“Indicatrix.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/indicatrix. Accessed 1 Dec. 2024.
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