: 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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The report highlights the denim industry’s use of hazardous chemicals (24 percent of processes), particularly potassium permanganate (PP) and pumice stones.
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Angela Velasquez, Sourcing Journal, 7 Apr. 2025
As previously reported, the eruption of Mt. Vesuvius released thermal energy roughly equivalent to 100,000 times the atomic bombs dropped on Hiroshima and Nagasaki at the end of World War II, spewing molten rock, pumice, and hot ash over the cities of Pompeii and Herculaneum in particular.
—Ars Technica, 27 Feb. 2025
Key Ingredients: Kaolin, mandelic acid, pumice How to Use: One to three times a week, massage using circular motions into clean, dry skin.
—Emily Orofino, Vogue, 21 Nov. 2024
Surrounding states, including Montana, Idaho and Wyoming, would face pyroclastic flows—a dangerous high-density mix of hot lava blocks, pumice, ash and volcanic gas.
—Thomas G. Moukawsher, Newsweek, 8 Nov. 2024
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Angela Velasquez, Sourcing Journal, 7 Apr. 2025
As previously reported, the eruption of Mt. Vesuvius released thermal energy roughly equivalent to 100,000 times the atomic bombs dropped on Hiroshima and Nagasaki at the end of World War II, spewing molten rock, pumice, and hot ash over the cities of Pompeii and Herculaneum in particular.
—Ars Technica, 27 Feb. 2025
Key Ingredients: Kaolin, mandelic acid, pumice How to Use: One to three times a week, massage using circular motions into clean, dry skin.
—Emily Orofino, Vogue, 21 Nov. 2024
Surrounding states, including Montana, Idaho and Wyoming, would face pyroclastic flows—a dangerous high-density mix of hot lava blocks, pumice, ash and volcanic gas.
—Thomas G. Moukawsher, Newsweek, 8 Nov. 2024
See All Example Sentences for pumice
Cite this Entry
“Pumice.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pumice. Accessed 22 Apr. 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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