# biotite

> English word · Noun · IPA /ˈbaɪəˌtaɪt/ · frequency rank #94,596

## Definitions
1. A dark brown mica; it is a mixed aluminosilicate and fluoride of potassium, magnesium and iron.

## Etymology
From Biot + -ite, named by J.F.L. Hausmann in 1847 in honour of the French physicist Jean-Baptiste Biot, who, in 1816, researched the optical properties of mica, discovering many unique properties.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/biotite