biotite

noun

bi·​o·​tite ˈbī-ə-ˌtīt How to pronounce biotite (audio)
: a generally black or dark green form of mica that is a constituent of crystalline rocks and consists of a silicate of iron, magnesium, potassium, and aluminum
biotitic adjective

Examples of biotite in a Sentence

Recent Examples on the Web Alteration associated with porphyry intrusions is often magnetic (from magnetite) and potassic (from sericite/biotite/K-feldspar). Sacramento Bee, 2 July 2024 But what intrigued the researchers was that biotite and feldspar don’t occur together. Roger Lewin, Discover Magazine, 11 Nov. 2019 Was the La Vache recipe--call it recipe B, for biotite and feldspar--also used at Niaux? Roger Lewin, Discover Magazine, 11 Nov. 2019

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'biotite.' 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 Biotit, from Jean B. Biot †1862 French mathematician

First Known Use

1848, in the meaning defined above

Time Traveler
The first known use of biotite was in 1848

Dictionary Entries Near biotite

Cite this Entry

“Biotite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/biotite. Accessed 23 Jul. 2024.

Kids Definition

biotite

noun
bi·​o·​tite ˈbī-ə-ˌtīt How to pronounce biotite (audio)
: a generally black or dark green mica containing iron, magnesium, potassium, and aluminum

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