: a volcanic glass full of cavities and very low in density that is used especially in powder form for smoothing and polishing
Examples of pumice in a Sentence
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When Pompeii was destroyed by the eruption of Mount Vesuvius in 79 AD, its buildings, thousands of inhabitants and this mosaic were buried beneath layers of ash and pumice.
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Issy Ronald, CNN Money, 16 July 2025
The best keratosis pilaris treatment products, at a glance
This one ranked best overall for its elite combination of chemical and physical exfoliants (pumice puffing beads) that leave the skin exceptionally smooth and bright.
—Talia Abbas, Glamour, 23 June 2025
Other footage showed pyroclastic flow — a combination of volcanic gas, lava blocks, ash and pumice that moves at an extremely high speed — rushing down the volcano.
—Natalia Senanayake, People.com, 3 June 2025
For one, pumice and bamboo offer a gentle, physical exfoliation.
—Cierra Black, Essence, 24 June 2025
See All Example Sentences for pumice
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Issy Ronald, CNN Money, 16 July 2025
The best keratosis pilaris treatment products, at a glance
This one ranked best overall for its elite combination of chemical and physical exfoliants (pumice puffing beads) that leave the skin exceptionally smooth and bright.
—Talia Abbas, Glamour, 23 June 2025
Other footage showed pyroclastic flow — a combination of volcanic gas, lava blocks, ash and pumice that moves at an extremely high speed — rushing down the volcano.
—Natalia Senanayake, People.com, 3 June 2025
For one, pumice and bamboo offer a gentle, physical exfoliation.
—Cierra Black, Essence, 24 June 2025
See All Example Sentences for pumice
Cite this Entry
“Pumice.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pumice. Accessed 29 Jul. 2025.
Copy CitationKids Definition
pumice
noun
pum·ice
ˈpəm-əs 
: a very light glass that is formed by the rapid cooling of lava from volcanoes, is full of small holes, and is used especially in powder form for smoothing and polishing
Medical Definition
pumice
noun
pum·ice
ˈpəm-əs
: a volcanic glass full of cavities and very light in weight used especially in powder form for smoothing and polishing
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