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Word: pumice
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Meaning:
Noun:
- A light, porous type of pyroclastic igneous rock, formed during explosive volcanic eruptions when liquid lava is ejected into the air as a froth containing masses of gas bubbles. As the lava solidifies, the bubbles are frozen into the rock.
Source: Wiktionary
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Verb:
- transitive To abrade or roughen with pumice.
Source: Wiktionary
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