calc-tufa
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calc-tu·fa
(kălk′to͞o′fə, -tyo͞o′-) also calc-tuff (-tŭf′)n.
Calcareous tufa, a porous or spongy deposit of calcium carbonate found in calcareous mineral springs.
[calc(areous) + tufa.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
calc-tufa
(ˈkælkˌtuːfə) orcalc-tuff
n
(Minerals) another name for tufa
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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Noun | 1. | calc-tufa - a soft porous rock consisting of calcium carbonate deposited from springs rich in lime |
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