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sima definition

sima (sī′mə)

noun

Geol. the heavy igneous rock material of the earth's inner crust, forming a continuous shell and underlying the sial and also the ocean floors

Etymology: Ger < si(licium), silicium + ma(gnesium), magnesium

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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