/ Dictionary / Index T tufa: Meaning and Definition of Find definitions for: tu•fa Pronunciation: (t'fu, ty'-), [key] — n. Geol. Also calleda porous limestone formed from calcium carbonate deposited by springs or the like. Cf. (not in technical use) tuff&hasp;. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tufa (Thesaurus) Tuesdays tuff Related Content Daily Word Quiz: grimace Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language