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pyrite definition

py·rite (rīt′)

noun pl. pyrites py·ri′·tes′ (pi rītēz′, pī-; pīrīts′)

a hard, brittle, yellow mineral, FeS, dimorphic with marcasite and occurring abundantly as a native ore, used to make sulfuric acid; iron sulfide

Etymology: L pyrites < Gr pyritēs, flint or millstone < pyritēs (lithos), fire (stone) < pyr, fire

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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