sanidine
noun
san·i·dine
ˈsanəˌdēn,
-də̇n
plural -s
: 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
sanidinic
adjective
¦⸗⸗¦dinik
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Merriam-Webster unabridged
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