pumice stone
"Pumice stone" is a light, porous volcanic rock used in both geological studies and personal care routines for its abrasive properties.
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Definition
B2Geology
(technical)A light and porous volcanic rock formed from rapidly cooling lava during an eruption.
Example
- Geologists collected samples of pumice stone from the volcanic site for analysis.
B2Personal Care
(common)A tool made from volcanic rock used to remove dead skin cells and smooth rough areas of the skin.
Example
- She used a pumice stone to exfoliate the calluses on her feet.