anorthosite

noun
an·​or·​tho·​site | \ ə-ˈnȯr-thə-ˌsīt How to pronounce anorthosite (audio) \

Definition of anorthosite

: a granular plutonic igneous rock composed almost exclusively of a soda-lime feldspar (such as labradorite)

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Other Words from anorthosite

anorthositic \ ə-​ˌnȯr-​thə-​ˈsi-​tik How to pronounce anorthosite (audio) \ adjective

Examples of anorthosite in a Sentence

Recent Examples on the Web Astronauts on Apollo 15 collected a 4 x 2-inch chunk of crystal anorthosite over 4 billion years old. Michael O’donnell, WSJ, 2 July 2021 The chunks of anorthosite weren’t deposited there by nature — they were trucked in from the mountains around Pasadena. Los Angeles Times, 19 July 2019 The chunks of anorthosite weren’t deposited there by nature — they were trucked in from the mountains around Pasadena. Los Angeles Times, 19 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'anorthosite.' 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 anorthosite

1863, in the meaning defined above

History and Etymology for anorthosite

French anorthose, a feldspar, from a- + Greek orthos — more at orth-

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Time Traveler for anorthosite

Time Traveler

The first known use of anorthosite was in 1863

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Dictionary Entries Near anorthosite

anorthose

anorthosite

Anosia

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Statistics for anorthosite

Last Updated

15 Jul 2021

Cite this Entry

“Anorthosite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/anorthosite. Accessed 28 Jul. 2021.

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More from Merriam-Webster on anorthosite

Britannica.com: Encyclopedia article about anorthosite

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