Standard Lemma guide

biotite

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

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /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

Usage: countable, uncountable

Topics: chemistry, geography, geology, mineralogy, natural-sciences, physical-sciences

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.

  • Armenian: բիոտիտ (biotit) — dark brown mica
  • Catalan: biotita — dark brown mica
  • Czech: biotit — dark brown mica
  • Dutch: biotiet — dark brown mica
  • Esperanto: biotito — dark brown mica
  • Estonian: biotiit — dark brown mica
  • Finnish: biotiitti — dark brown mica
  • French: biotite — dark brown mica
  • Galician: biotita — dark brown mica
  • German: Biotit — dark brown mica
  • Icelandic: bíótít — dark brown mica
  • Italian: biotite — dark brown mica
  • Japanese: 黒雲母 (kurounmo) — dark brown mica
  • Norwegian Bokmål: biotitt — dark brown mica
  • Norwegian Nynorsk: biotitt — dark brown mica
  • Polish: biotyt — dark brown mica
  • Portuguese: biotita — dark brown mica
  • Romanian: biotit — dark brown mica
  • Russian: биотит (biotit) — dark brown mica
  • Serbo-Croatian: био̀тӣт — dark brown mica
  • Serbo-Croatian: biòtīt — dark brown mica
  • Slovak: biotit — dark brown mica
  • Slovene: biotít — dark brown mica
  • Spanish: biotita — dark brown mica
  • Turkish: biyotit — dark brown mica