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epidote
[ ep-i-doht ]
noun
- a mineral, calcium aluminum iron silicate, Ca 2 (Al, Fe) 3 Si 3 O 12 (OH), occurring in green prismatic crystals.
epidote
/ ˈɛpɪˌdəʊt; ˌɛpɪˈdɒtɪk /
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)
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: Ca 2 (Al, Fe) 3 (SiO 4 ) 3 OH.
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Derived Forms
- epidotic, adjective
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Other Words From
- ep·i·dot·ic [ep-i-, dot, -ik], adjective
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Word History and Origins
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Word History and Origins
Origin of epidote1
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
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