Diabase Definition

Webster's New World
A finely crystalline, intrusive basaltic rock made up mainly of labradorite and pyroxene.
Webster's New World
Altered dolerite.
Webster's New World

Origin of Diabase

  • French partly from Greek diabasis a crossing over (from diabainein to pass through or over diabetes) and partly from diabase (dia- two) (alteration of di-) (from Greek di- di–1) (base basis) (from Old French base1)

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

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