/ Dictionary / Index P petalite: Meaning and Definition of Find definitions for: pet•al•ite Pronunciation: (pet'l-īt"), [key] — n. a mineral, lithium aluminum silicate, Li(AlSiO), occurring in colorless or white foliated masses: an important source of lithium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. petaline petalody Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language