[ ep-i-doht ]
/ ˈɛp ɪˌdoʊt /


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

Nearby words

  1. epididymoplasty,
  2. epididymotomy,
  3. epididymovasectomy,
  4. epididymovasostomy,
  5. epidiorite,
  6. epidural,
  7. epidural anesthesia,
  8. epidural block,
  9. epidural hematoma,
  10. epidural space

Origin of epidote

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

Related formsep·i·dot·ic [ep-i-dot-ik] /ˌɛp ɪˈdɒt ɪk/, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples 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 Formsepidotic (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

Science 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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