/ Dictionary / Index Z zinnwaldite: Meaning and Definition of Find definitions for: zinn•wald•ite Pronunciation: (tsin'väl-tīt"), [key] — n. Mineral. a yellow-brown variety of mica containing iron, found with tin ores. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: zinnwaldite (Thesaurus) zinnia Zinoviev Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language