noun · 2 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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/ˈbaɪəˌtaɪt/
Southern-England:Recorded audio is listed in the source snapshot.
CMU ARPABET:B AY1 AH0 T AY2 T
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
A dark brown mica; it is a mixed aluminosilicate and fluoride of potassium, magnesium and iron.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
dark brown to black mica found in igneous and metamorphic rock
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: mica, isinglass
Narrower terms: lepidomelane
History
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.
Across languages
Translations
25 source translations are retained for this English entry.