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tufa
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Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
tu·fa 
[too-fuh, tyoo-] Pronunciation Key
—Related forms
[too-fuh, tyoo-] Pronunciation Key –noun Geology.
| 1. | Also called calcareous tufa, calc-tufa, calc-tuff. a porous limestone formed from calcium carbonate deposited by springs or the like. Compare travertine. |
| 2. | (not in technical use) tuff2. |
[Origin: 1760–70; < It tufo < L tōfus]
] —Related forms
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
American Heritage Dictionary - Cite This Source - Share This
| tu·fa
(tōō'fə, tyōō'-) Pronunciation Key
n.
[Obsolete Italian tufa, tufo, from Latin tōfus.] tu·fa'ceous (-fā'shəs) adj. |
(Download Now or Buy the Book)
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
American Heritage Dictionary - Cite This Source - Share This
| tuff
(tŭf) Pronunciation Key
n. A rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel. Also called tufa. [French tuf, from Old French, from Old Italian tufo, tufa; see tufa.] tuff·a'ceous (tŭ-fā'shəs) adj. |
(Download Now or Buy the Book)
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Online Etymology Dictionary - Cite This Source - Share This
tufa
tufa
"a porous rock," 1770, from It. tufa, from L. tophus "loose, porous volcanic rock," an Oscan-Umbrian loan-word.
Online Etymology Dictionary, © 2001 Douglas Harper
WordNet - Cite This Source - Share This
| tufa | |
noun | |
| 1. | a soft porous rock consisting of calcium carbonate deposited from springs rich in lime |
| 2. | hard volcanic rock composed of compacted volcanic ash [syn: tuff] |
WordNet® 3.0, © 2006 by Princeton University.
The American Heritage Science Dictionary - Cite This Source - Share This
tufa
(t 'fə) Pronunciation Key
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 © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Copyright © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Webster's Revised Unabridged Dictionary - Cite This Source - Share This
Tufa
Tu"fa\, [It. fufo soft, sandy stone, L. tofus, tophus. Cf. Tofus, Toph, and Tophin.] (Min.) (a) A soft or porous stone formed by depositions from water, usually calcareous; -- called also calcareous tufa. (b) A friable volcanic rock or conglomerate, formed of consolidated cinders, or scoria.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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