/ Dictionary / Index L laumontite: Meaning and Definition of Find definitions for: lau•mont•ite Pronunciation: (lō-mon'tīt), [key] — n. a white zeolite mineral, chiefly hydrated silicate of aluminum and calcium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lau lau launce Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language