English noun: tufa | |||
1. | tufa (substance) a soft porous rock consisting of calcium carbonate deposited from springs rich in lime | ||
Synonyms | calc-tufa | ||
Broader (hypernym) | rock, stone | ||
2. | tufa (substance) hard volcanic rock composed of compacted volcanic ash | ||
Synonyms | tuff | ||
Broader (hypernym) | volcanic rock | ||