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sillimanite Definition

sil·li·man·ite (silə mə nīt′)

noun

a very hard, mineral, aluminum silicate, AlSiO, usually found in metamorphic rock as long, slender crystals of various colors

Etymology: after B. Silliman (1779-1864), U.S. chemist and geologist + -ite

Browse dictionary entries near sillimanite

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