Sillimanite Definition

sĭlə-mə-nīt
noun
A very hard, mineral, aluminum silicate, Al2SiO5, usually found in metamorphic rock as long, slender crystals of various colors.
Webster's New World

Other Word Forms of Sillimanite

Noun

Singular:
sillimanite
Plural:
sillimanites

Origin of Sillimanite

  • Named after American chemist and geologist Benjamin Silliman (1779-1864) in 1824.

    From Wiktionary

  • After Benjamin Silliman

    From American Heritage Dictionary of the English Language, 5th Edition

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sillimanite