[ ep-i-doht ]
/ ˈɛp ɪˌdoʊt /


a mineral, calcium aluminum iron silicate, Ca2(Al, Fe)3Si3O12(OH), occurring in green prismatic crystals.

Origin of epidote

1800–10; <French épidote<Greek *epidotós given besides, increased (verbid of epididónai), equivalent to epi-epi- + dotós given (verbid of didónai)


ep·i·dot·ic [ep-i-dot-ik], /ˌɛp ɪˈdɒt ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for epidote

British Dictionary definitions for epidote

/ (ˈɛpɪˌdəʊt) /


a green mineral consisting of hydrated calcium iron aluminium silicate in monoclinic crystalline form: common in metamorphic rocks. Formula: Ca 2 (Al,Fe) 3 (SiO 4) 3 (OH)

Derived forms of epidote

epidotic (ˌɛpɪˈdɒtɪk), adjective

Word Origin for epidote

C19: from French épidote, ultimately from Greek epididonai to increase, from didonai to give; so called because two sides of its crystal are longer than the other two sides
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for epidote

[ ĕpĭ-dōt′ ]

A yellowish-green or blackish-green monoclinic mineral. Epidote occurs as formless grains or as prism-shaped crystals, and is found in limestones that have undergone slight metamorphism or in igneous rocks. Chemical formula: Ca2(Al, Fe)3(SiO4)3OH.
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