herapathite
noun
her·a·path·ite
\ˈherəˌpaˌthīt, -pȧˌ-\
Definition of herapathite
-s
: a salt of quinine that is obtained by treating the sulfate with iodine in the form of rhomboidal plates capable of polarizing light and that is used as a polarizing agent usually in the form of small crystals oriented in the same direction in a transparent film
From the M-W Editors
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Origin and Etymology of herapathite
William B. Herapath †1868 English chemist + English -ite
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