Share this entry

Share this page

biotite

Line breaks: bio|tite
Pronunciation: /ˈbʌɪətʌɪt
 
/

Definition of biotite in English:

noun

[mass noun]
A black, dark brown, or greenish black micaceous mineral, occurring as a constituent of many igneous and metamorphic rocks.
Example sentences
  • Although dark minerals such as biotite and hornblende are usually present, giving the rock a speckled appearance, they are never abundant.
  • Quartz, feldspar, white mica and biotite are all major constituents.
  • All four samples are medium-grained, and comprise variable proportions of hornblende, feldspar and quartz with accessory biotite and titanite.

Origin

mid 19th century: named after J.-B. Biot (1774–1862), French mineralogist.

Definition of biotite in:

Share this entry

Share this page

 

What do you find interesting about this word or phrase?

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day ingratiate
Pronunciation: ɪnˈɡreɪʃɪeɪt
verb
bring oneself into favour with someone through flattery…