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1. (n.) tufa
a porous limestone formed from calcium carbonate deposited by springs or the like.
Etymology: (1760–70; < It tufo tuff < L tōfus, tūfus)
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| Definition of 'tufa' |
Princeton's WordNet |
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1. (noun) tufa, calc-tufa
a soft porous rock consisting of calcium carbonate deposited from springs rich in lime
2. (noun) tuff, tufa
hard volcanic rock composed of compacted volcanic ash
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| Definition of 'tufa' |
Webster Dictionary |
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1. tufa
a soft or porous stone formed by depositions from water, usually calcareous; -- called also calcareous tufa
2. tufa
a friable volcanic rock or conglomerate, formed of consolidated cinders, or scoria
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Definitions of tufa 
