[kalk-too-fuh, -tyoo-]


Also calc-tuff [kalk-tuhf] /ˈkælkˌtʌf/.

Origin of calc-tufa

First recorded in 1815–25; calc- + tufa


[too-fuh, tyoo-]

noun Geology.

Also called calcareous tufa, calc-tufa, calc-tuff. a porous limestone formed from calcium carbonate deposited by springs or the like.Compare travertine.
(not in technical use) tuff2.

Origin of tufa

1760–70; < Italian tufo < Latin tōfus
Related formstu·fa·ceous [too-fey-shuh s, tyoo-] /tuˈfeɪ ʃəs, tyu-/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for calc-tuff


calc-tuff (ˈkælkˌtʌf)


another name for tufa



a soft porous rock consisting of calcium carbonate deposited from springs rich in limeAlso called: calc-tufa
Derived Formstufaceous (tjuːˈfeɪʃəs), adjective

Word Origin for tufa

C18: from Italian tufo, from Late Latin tōfus
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for calc-tuff



"a porous rock," 1770, from Italian tufa "tufa, porous rock," probably from Latin tufus, tophus "loose, porous volcanic rock," said to be an Oscan-Umbrian loan-word.

Online Etymology Dictionary, © 2010 Douglas Harper

calc-tuff in Science



A soft, friable, and porous sedimentary rock consisting of calcium carbonate and formed by the evaporation of water, especially at the mouth of a hot spring or on a drying lakebed. It is similar to, but harder than, travertine.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.