/ Dictionary / Index T taconite: Meaning and Definition of Find definitions for: tac•o•nite Pronunciation: (tak'u-nīt"), [key] — n. a low-grade iron ore, containing about 27 percent iron and 51 percent silica, found as a hard rock formation in the Lake Superior region. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: taconite (Thesaurus) Tacoma tact Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language