sanidine

noun
san·i·dine | \ ˈsanəˌdēn , -də̇n \
plural -s

Definition of sanidine 

: a variety of orthoclase in often transparent crystals in eruptive rock (as trachyte) that is thought to form at higher temperatures than adularia

called also glassy feldspar

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Other words from sanidine

sanidinic \¦⸗⸗¦dinik \ adjective

History and Etymology for sanidine

German sanidin, from Greek sanid-, sanis board + German -in -ine; from its tabular crystals

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