tufa Tuesday • tufaceous · · · Info · Definitions · Synonyms · Characters · · tufa · · Text Latin · · Script 4 · · Length Definitions · · · (noun) a soft porous rock consisting of calcium carbonate deposited from springs rich in lime. Synonyms: calc-tufa. · · Noun Definition 1 (noun) hard volcanic rock composed of compacted volcanic ash. Synonyms: tuff. · · Noun Definition 2 Synonyms · · · calc-tufa · · Synonym 1 tuff · · Synonym 2 Characters · · a latin small letter a U+0061 f latin small letter f U+0066 t latin small letter t U+0074 u latin small letter u U+0075