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herapathite

noun her·a·path·ite \ ˈherəˌpaˌthīt , -pȧˌ- \

Definition of herapathite

plural -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

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Origin and Etymology of herapathite

William B. Herapath †1868 English chemist + English -ite

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