biotite

Noun

dark brown to black mica found in igneous and metamorphic rock
A dark brown mica; it is a mixed aluminosilicate and fluoride of potassium, magnesium and iron.
pl. -S a form of mica BIOTITIC adj

Origin / 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.

Scrabble Score: 9

biotite: valid Scrabble (US) TWL word
biotite: valid Scrabble Word in Merriam-Webster MW Dictionary
biotite: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 10

biotite is a valid Words With Friends word