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tuefall | tues | tuesday | tuet | tuf-taffeta | tufa | tufaceous | tuff | tuffet | tuffoon | tuft

tufa

 : 
Noun
 : 
tu=fa

CIDE DICTIONARY

tufa,  [It. fufo soft, sandy stone, L. tofus, tophus. Cf. Tofus, Toph, and Tophin.].
     A soft or porous stone formed by depositions from water, usually calcareous; -- called also calcareous tufa.  [1913 Webster]

OXFORD DICTIONARY

tufa, n.
1 a porous rock composed of calcium carbonate and formed round mineral springs.
2 = TUFF.

Derivative
tufaceous adj.
Etymology
It., var. of tufo: see TUFF

For further exploring for "tufa" in Webster Dictionary Online


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