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Table of Contents -- tuff POS
WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY

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tuff

Noun

WORDNET DICTIONARY

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

is a kind of volcanic rock

tuff, n.

Same as Tufa. [1913 Webster]

tuff, n. rock formed by the consolidation of volcanic ash.

Derivative

tuffaceous adj.

Etymology

F tuf, tuffe f. It. tufo f. LL tofus, L TOPHUS