noun ep·i·dote \ˈe-pə-ˌdōt\

Definition of epidote

  1. :  a yellowish-green mineral Ca2(Al,Fe)3Si3O12OH usually occurring in grains or columnar masses and sometimes used as a gemstone

Origin and Etymology of epidote

French épidote, from Greek epididonai to give in addition, from epi- + didonai to give — more at date

First Known Use: 1808

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