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pumice noun

  /ˈpʌm.ɪs/
  • A light, porous type of pyroclastic igneous rock, formed during explosive volcanic eruptions when liquid lava is ejected into water or air as a froth containing masses of gas bubbles, which are frozen into the rock as the lava solidifies.
 pomice
pumice-stone
pomice
pumice stone
pomice
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