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sanidine

[san-i-deen, -din] /ˈsæn ɪˌdin, -dɪn/
noun, Mineralogy.
1.
a glassy, often transparent variety of orthoclase in which sodium may replace as much as 50 percent of the potassium: forms phenocrysts in some igneous rocks.
Origin of sanidine
1805-1815
1805-15; < German Sanidin, equivalent to Greek sanid- (stem of sanís plank) + German -in -ine2
Related forms
sanidinic
[san-i-din-ik] /ˌsæn ɪˈdɪn ɪk/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for sanidine

sanidine

/ˈsænɪˌdiːn; -dɪn/
noun
1.
an alkali feldspar that is a high-temperature glassy form of orthoclase in flat, tabular crystals, found in lavas and dykes. Formula: KAlSi3O8
Word Origin
C19: from German, from Greek sanis, sanidos a board
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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