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anorthoclase

American  
[an-awr-thuh-kleys, -kleyz] / ænˈɔr θəˌkleɪs, -ˌkleɪz /

noun

Mineralogy.

  1. a variety of microcline, rich in sodium and sometimes having a play of color: sometimes considered a variety of orthoclase.

anorthoclase Scientific  
/ ăn-ôr′thə-klās′ /

  1. A white to colorless triclinic mineral of the alkali feldspar group. It is a common constituent in the matrices of slightly alkaline volcanic rocks. Chemical formula: (Na,K)AlSi 3 O 8 .

Etymology

Origin of anorthoclase

an- 1 + orthoclase

Example Sentences

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There are also placed in the anorthic class a potash-felspar called microcline, and a rare soda-potash-felspar known as anorthoclase.

From Project Gutenberg

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.