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Short "hint"

n. - Hard volcanic rock composed of compacted volcanic ash; A soft porous rock consisting of calcium carbonate deposited from springs rich in lime.

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Usage examples (35)
  • People sometimes call it tufa, like those stones you see in fish tanks.
  • It's not actually known what Edwin's symbol was Bede says he used a Roman-style standard called a tufa but doesn't describe it.
  • The etymology of Latin tofus 'tufa' isn't written ...
  • The etymology of Latin tofus 'tufa' isn't written in stone
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