andesite
noun
an·des·ite
ˈan-di-ˌzīt 
: an extrusive usually dark grayish rock consisting essentially of oligoclase or feldspar
Examples of andesite in a Sentence
Recent Examples on the Web
The andesite magma from El Chichón has about 2.6 weight percent SO3, many times more than most magmas.
—
Erik Klemetti, Discover Magazine, 28 Mar. 2012
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, 1 Nov. 2017
The main cone is made of andesite, dacite, and rhyodacite.
—Jennifer Earl, Fox News, 16 May 2018
Erik Klemetti, Discover Magazine, 28 Mar. 2012
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, 1 Nov. 2017
The main cone is made of andesite, dacite, and rhyodacite.
—Jennifer Earl, Fox News, 16 May 2018
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'andesite.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Word History
Etymology
German Andesit, from Andes
First Known Use
1837, in the meaning defined above
Dictionary Entries Near andesite
Cite this Entry
“Andesite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/andesite. Accessed 30 Sep. 2023.
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Kids Definition
andesite
noun
an·des·ite
ˈan-di-zīt
: a usually dark grayish rock of feldspar that is formed from lava
More from Merriam-Webster on andesite
Britannica.com: Encyclopedia article about andesite
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