/ Dictionary / Index S sanidine: Meaning and Definition of Find definitions for: san•i•dine Pronunciation: (san'i-dēn", -din), [key] — n. Mineral. 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. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sanicle sanies Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language