Also calc-tuff [kalk-tuhf] /ˈkælkˌtʌf/.
Origin of calc-tufa
Origin of tufa
1760–70; < Italian tufo < Latin tōfus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a soft porous rock consisting of calcium carbonate deposited from springs rich in limeAlso called: calc-tufa
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
"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
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.
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