/ Dictionary / Index M microlite: Meaning and Definition of Find definitions for: mi•cro•lite Pronunciation: (mī'kru-līt"), [key] — n. Mineral. any microscopic crystal. a mineral, principally calcium pyrotantalate, CaTaO, usually including niobium, fluorine, and other impurities, occurring in cubic crystals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. microlecithal microlith Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language