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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 tu·fa /ˈtufə, ˈtju-/
 凝灰岩;多孔凝灰岩

From: Webster's Revised Unabridged Dictionary (1913)

 Tu·fa  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.
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From: WordNet (r) 2.0

 tufa
      n 1: a soft porous rock consisting of calcium carbonate deposited
           from springs rich in lime [syn: calc-tufa]
      2: hard volcanic rock composed of compacted volcanic ash [syn:
         tuff]