epidote

[ ep-i-doht ]

/ ˈɛp ɪˌdoʊt /

noun

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

Nearby words

epididymoplasty, epididymotomy, epididymovasectomy, epididymovasostomy, epidiorite, epidote, epidural, epidural anesthesia, epidural block, epidural hematoma, 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 forms

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. 2019

Examples from the Web for epidote

The feldspar is decomposed with the resulting formation of epidote, which is quite prominent.
The Long Labrador Trail|Dillon Wallace
Parallel with the micas that cause the schistosity, the growth of the quartz and epidote lenses took place.
History and Comprehensive Description of Loudoun County, Virginia|James W. Head
Biotite, if present, is brown; epidote is yellow or colourless; rutile, apatite and quartz all occur with some frequency.
Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6|Various
Epidote is an abundant rock-forming mineral, but one of secondary origin.
Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6|Various

Epidote, often with enclosures of orthite, is by no means rare in gneisses from many different parts of the world.
Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2|Various

British Dictionary definitions for epidote

epidote

/ (ˈɛpɪˌdəʊt) /

noun

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

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

Science definitions for epidote

epidote

[ ĕp′ĭ-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.