Dictionary![]() ![]() tu•faPronunciation: (tOO'fu, tyOO'-), [key] —n. Geol. 1. Also called calcareous tufa, calc-tufa, calc-tuff. a porous limestone formed from calcium carbonate deposited by springs or the like. Cf. travertine. 2. (not in technical use) tuff2. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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