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idocrase

[ahy-duh-kreys, id-uh-]

i·do·crase

[ahy-duh-kreys, id-uh-]
noun Mineralogy.

Origin:
1795–1805; < French < Greek eîdo(s) form + krâsis mixture
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Idocrase is always a great word to know.
So is bezoar. Does it mean:
a stew of meat, vegetables, potatoes, etc.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
Collins
World English Dictionary
idocrase (ˈaɪdəˌkreɪs, ˈɪd-)
 
n
another name for vesuvianite
 
[C19: from French, from Greek eidos form + krasis a mingling]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Encyclopedia Britannica
Encyclopedia

idocrase

common silicate mineral that occurs in crystalline limestones near their contacts with igneous rocks, and in beds of marble and calcsilicate granulite that are associated with gneiss and mica schist. Fine glassy crystals coloured yellow, green, or brown have been found in the Ala Valley in the Piedmont, and on Mte. Somma, Italy; the Vilyuy River, Siberia; Christiansand, Nor.; Litchfield, Quebec; and Auburn, Maine, Amity, N.Y., and Franklin, N.J. For chemical formula and detailed physical properties, see silicate mineral (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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