py·​ro·​clas·​tic | \ ˌpī-rō-ˈkla-stik How to pronounce pyroclastic (audio) \

Definition of pyroclastic

: formed by or involving fragmentation as a result of volcanic or igneous action

Examples of pyroclastic in a Sentence

Recent Examples on the Web Its most recent eruptive cycle began in 2002, but this explosion proved especially dangerous, says Venzke, due to the cloud of hot ash—called pyroclastic flow—that flowed down the mountain and into the town below. Lila Thulin, Smithsonian, "Riveting Footage Captures the Destruction of Last Year’s Volcanic Eruptions in Hawaii and Guatemala," 6 Sep. 2019 Italy’s National Institute of Geophysics and Vulcanology said the explosion caused a pyroclastic flow (a fast-moving current of hot gas and volcanic matter) that extended for several hundred meters into the sea. Time, "The Eruption of Italy's Stromboli Volcano Resulted in Some Harrowing Images From Nearby Tourists," 29 Aug. 2019 From thundering pyroclastic flows to scorching rivers of lava, volcanoes are famed for their furious fireworks. Ben Simons, National Geographic, "Volcanoes blow smoke rings. Now we know how they do it.," 7 Aug. 2019 Analyzing pyroclastic flows in real life is not only difficult, but also profoundly dangerous. National Geographic, "Volcanic 'avalanches' glide on air, boosting their deadly speed," 8 Apr. 2019 And nearly 200 people remain missing in villages buried by thick ash, debris and pyroclastic flow. Christopher Dawson, CNN, "How to help Guatemala recover from the Fuego volcano," 7 June 2018 Agung’s 1963 eruption lasted 11 months, producing dangerous ash fall and pyroclastic flows that led to more than 1,000 deaths and property damage. Mahita Gajanan, Time, "8 of the World’s Most Dangerous Volcanoes, According to Experts," 6 June 2018 Lahar is described as flow of pyroclastic material and slurry. Ryan Gaydos, Fox News, "Guatemala volcano eruption kills at least 65, forces thousands to evacuate," 2 Oct. 2018 Unlike Pompeii, which was only hit by falling volcanic ash, Herculaneum was directly in the path of pyroclastic flows headed to the sea. Avery Thompson, Popular Mechanics, "Mount Vesuvius Caused Romans' Heads to Explode," 10 Oct. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pyroclastic.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of pyroclastic

1862, in the meaning defined above

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The first known use of pyroclastic was in 1862

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Cite this Entry

“Pyroclastic.” The Dictionary, Merriam-Webster Inc., Accessed 14 December 2019.

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