volcanism

noun

vol·​ca·​nism ˈväl-kə-ˌni-zəm How to pronounce volcanism (audio)
ˈvȯl-
: volcanic action or activity

Examples of volcanism in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Melting the lunar surface through extensive volcanism is one way to reset the zircons. Nola Taylor Tillman, Space.com, 8 May 2025 About 80 percent of Earth’s volcanism happens on the seafloor, with the vast majority occurring along the mid-ocean ridge. Maya Wei-Haas, New York Times, 2 May 2025 The current thinking is that ancient volcanism on Mars expelled a considerable amount of hydrogen into the atmosphere, which, combined with CO2, could make a sufficient greenhouse effect. Jonathan O’Callaghan, JSTOR Daily, 10 Apr. 2025 Few areas on the farside, with its dearth of volcanism, have a high abundance of thorium. Keith Cooper, Space.com, 9 Apr. 2025 See All Example Sentences for volcanism

Word History

First Known Use

1830, in the meaning defined above

Time Traveler
The first known use of volcanism was in 1830

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Cite this Entry

“Volcanism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/volcanism. Accessed 23 May. 2025.

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