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