volcanic glass
noun
: natural glass produced by the cooling of molten lava too rapidly to permit crystallization
Examples of volcanic glass in a Sentence
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Perlite is a lightweight, porous volcanic glass used to improve aeration and drainage in soil and other plant mixes.
—
Michele Laufik, Martha Stewart, 10 Feb. 2026
The most recent eruption included threats of high levels of volcanic gas and Pele's hair, the term for strands of volcanic glass produced by lava fountaining activity.
—Julia Jacobo, ABC News, 8 Dec. 2025
Because water has been found in lunar rock before, embedded in crystals of volcanic glass or mineral grains, lasering promising boulders may prove important.
—Elizabeth Howell, Space.com, 24 Nov. 2025
Another major hazard is fallout of volcanic fragments known as Pele's hair, or strands of volcanic glass that can be carried well over 10 miles from a vent.
—Robert Birsel, MSNBC Newsweek, 24 Nov. 2025
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Michele Laufik, Martha Stewart, 10 Feb. 2026
The most recent eruption included threats of high levels of volcanic gas and Pele's hair, the term for strands of volcanic glass produced by lava fountaining activity.
—Julia Jacobo, ABC News, 8 Dec. 2025
Because water has been found in lunar rock before, embedded in crystals of volcanic glass or mineral grains, lasering promising boulders may prove important.
—Elizabeth Howell, Space.com, 24 Nov. 2025
Another major hazard is fallout of volcanic fragments known as Pele's hair, or strands of volcanic glass that can be carried well over 10 miles from a vent.
—Robert Birsel, MSNBC Newsweek, 24 Nov. 2025
See All Example Sentences for volcanic glass
Cite this Entry
“Volcanic glass.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/volcanic%20glass. Accessed 17 Feb. 2026.
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