epidote Hear it!

epidote definition

epi·dote (ep′ə dōt′)

noun

hydrous calcium aluminum iron silicate, a yellowish-green to black mineral, Ca(AlFe)SiO(OH), found as monoclinic crystals, grains, or masses and sometimes used as a gem

Etymology: Fr épidote < Gr epididonai, to give besides, increase < epi-, over + didonai, to give (see date): so named by R.-J. Haüy (1743-1822), Fr mineralogist; from the enlarged base of some of the crystal forms

Related Forms:

  • epidotic ep′i·dot′ic (-dät′ik) adjective

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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