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biotite
 

Definitions from WordNet

Noun biotite has 1 sense
  1. biotite - dark brown to black mica found in igneous and metamorphic rock
    --1 is a kind of     mica, isinglass
    --1 has particulars: lepidomelane

Definitions from the Web

Biotite

Definition:

Biotite is a common dark-colored mineral of the mica group, with a sheet structure. It typically occurs in igneous and metamorphic rocks and is a prominent constituent in granite.

Examples:

Noun Sense 1: The geologist found beautiful biotite crystals embedded in the granite rock.

Noun Sense 2: Biotite is used in some cosmetic products for its natural shimmer and lustrous appearance.

Adjective Sense: The biotite-rich soil in the region provides an ideal habitat for certain plant species.

Verb Sense: The weathering process causes the granite to biotite, altering its composition over time.

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Biotite Cosmetics
Books on Biotite Geology
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