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Tufa

Noun

tu=fa

WORDNET DICTIONARY

tufa(n = noun.substance) calc-tufa - a soft porous rock consisting of calcium carbonate deposited from springs rich in lime; Array

is a kind of rock, stone

tufa(n = noun.substance) tuff - hard volcanic rock composed of compacted volcanic ash; Array

is a kind of volcanic rock

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]

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