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dioptase
di·op·tase
/
daɪˈɒp
teɪs
/
Show Spelled
[
dahy-
op
-teys
]
Show IPA
noun
a mineral, hydrous copper silicate, CuSiO
3
⋅H
2
O, occurring in emerald-green crystals.
Origin:
1795–1805;
<
French,
equivalent to
di-
di-
3
+
Greek
optasía
view
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source
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Link To
dioptase
Collins
World English Dictionary
dioptase
(daɪˈɒpteɪs, -teɪz)
—
n
a green glassy mineral consisting of hydrated copper silicate in hexagonal crystalline form. Formula: Cu
6
Si
6
O
18
.6H
2
O
[C19: from French, from Greek
dia-
through +
optos
visible]
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Relevant Questions
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