noun Etymology: German Biotit, from Jean B. Biot died 1862 French mathematician Date: 1862 a generally black or dark green form of mica that is a constituent of crystalline rocks and consists of a silicate of iron, magnesium, potassium, and aluminum, biotitic adjective
BIOTITE
Meaning of BIOTITE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012