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andesite

noun
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an·​des·​ite | \ ˈan-di-ˌzīt How to pronounce andesite (audio) \

Definition of andesite

: an extrusive usually dark grayish rock consisting essentially of oligoclase or feldspar
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Other Words from andesite

andesitic \ ˌan-​di-​ˈzi-​tik How to pronounce andesite (audio) \ adjective

Examples of andesite in a Sentence

Recent Examples on the Web The pre-1980 cone, which took shape in just the past 2,500 years, consisted in part of mountain-building andesite rocks. — Steve Olson, Scientific American, "Inside Mount Saint Helens, Scientists Find Clues to Eruption Prediction," 1 Nov. 2017 The main cone is made of andesite, dacite, and rhyodacite. — Jennifer Earl, Fox News, "Hawaii's Kilauea volcano ranked among top 10 most dangerous in US," 16 May 2018

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

First Known Use of andesite

1837, in the meaning defined above

History and Etymology for andesite

German Andesit, from Andes

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Time Traveler for andesite

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The first known use of andesite was in 1837

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Cite this Entry

“Andesite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/andesite. Accessed 26 Feb. 2021.

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More from Merriam-Webster on andesite

Britannica.com: Encyclopedia article about andesite

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