[ san-i-deen, -din ]

  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

1805–15; <German Sanidin, equivalent to Greek sanid- (stem of sanís plank) + German -in-ine2

Other words from sanidine

  • san·i·din·ic [san-i-din-ik], /ˌsæn ɪˈdɪn ɪk/, adjective

Words Nearby sanidine Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use sanidine in a sentence

British Dictionary definitions for sanidine


/ (ˈsænɪˌdiːn, -dɪn) /

  1. an alkali feldspar that is a high-temperature glassy form of orthoclase in flat, tabular crystals, found in lavas and dykes. Formula: KAlSi 3 O 8

Origin of sanidine

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