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say it: TOO-fuh
tufa is a noun meaning "a soft porous rock consisting of calcium carbonate deposited from springs rich in lime". It is pronounced /ˈtufə/ — TOO-fuh. It carries 2 recorded senses.
hard volcanic rock composed of compacted volcanic ash
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for tufa come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.