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tufa 音標拼音: [t'ufə]

n. 凝灰巖;多孔凝灰巖

凝灰岩;多孔凝灰岩

WordNet (r) 3.0 (2006) (WordNet)

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

The Collaborative International Dictionary of English v.0.48 (gcide)

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.
[1913 Webster]

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tufa	查看　tufa　在Yahoo字典中的解釋	Yahoo英翻中〔查看〕

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