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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The lava didn't threaten communities nearby, but the U.S. Geological Survey said volcanic gas and strands of volcanic glass known as Pele's hair can affect residents and visitors nearby. Jeanine Santucci, USA TODAY, 14 Feb. 2025 Analysis of the sample found volcanic glass beads in the lunar regolith that have been dated to 123 million years ago, give or take 15 million years. Keith Cooper, Space.com, 3 Feb. 2025 While lava flows remain confined to the Kīlauea summit caldera, the eruption produces hazards such as volcanic gas emissions, vog (volcanic smog) and Pele's hair—a type of volcanic glass—that can pose health risks and environmental challenges. Jonathan Granoff, Newsweek, 28 Jan. 2025 The long, thin strands that resemble hair are actually volcanic glass, according to the U.S. Geological Survey’s Hawaiian Volcano Observatory. Sara Schilling, Sacramento Bee, 28 Jan. 2025 See All Example Sentences for volcanic glass

Word History

First Known Use

1780, in the meaning defined above

Time Traveler
The first known use of volcanic glass was in 1780

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Cite this Entry

“Volcanic glass.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/volcanic%20glass. Accessed 27 Feb. 2025.

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