/ Dictionary / Index L leucite: Meaning and Definition of Find definitions for: leu•cite Pronunciation: (l'sīt), [key] — n. a whitish or grayish mineral, potassium aluminum silicate, KAlSiO, found in alkali volcanic rocks. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. leucine leuco- Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language