/ Dictionary / Index T trona: Meaning and Definition of Find definitions for: tro•na Pronunciation: (trō'nu), [key] — n. a monoclinic mineral, grayish or yellowish hydrous sodium carbonate and bicarbonate, NaCO&multiplydot;NaHCO&multiplydot;2H, occurring in dried or partly evaporated lake basins. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. -tron Trondheim Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language