BIOTITE

Pronunciation (US):

(GB):

IPA (US):

 Dictionary entry overview: What does biotite mean? 

• BIOTITE (noun)
  The noun BIOTITE has 1 sense:

1. dark brown to black mica found in igneous and metamorphic rock

  Familiarity information: BIOTITE used as a noun is very rare.

 Dictionary entry details 

• BIOTITE (noun)

Sense 1

Meaning:

Dark brown to black mica found in igneous and metamorphic rock

Classified under:

Nouns denoting substances

Hypernyms ("biotite" is a kind of...):

isinglass; mica (any of various minerals consisting of hydrous silicates of aluminum or potassium etc. that crystallize in forms that allow perfect cleavage into very thin leaves; used as dielectrics because of their resistance to electricity)

Hyponyms (each of the following is a kind of "biotite"):

lepidomelane (a mica that is a biotite containing iron)

Derivation:

biotitic (relating to or involving biotite)

 Context examples 

Large bodies composed of biotite granite, such as the Wyoming batholith, are more common in the Neoarchean era (2.8 billion-2.5 billion years ago) than in younger terrains.

(Supervolcanoes like Yellowstone may have been more active in the past, NSF)