/ Dictionary / Index H heulandite: Meaning and Definition of Find definitions for: heu•land•ite Pronunciation: (hy'lun-dīt"), [key] — n. a white or transparent, colorless mineral of the zeolite family, hydrous calcium aluminum silicate, CaAlSiO&multiplydot;6HO, occurring in basic volcanic rocks in the form of crystals with a pearly luster. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: heulandite (Thesaurus) heuchera Heuneburg Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language