euclase

noun
eu·clase | \ˈyü-ˌklās, -ˌklāz\

Definition of euclase 

: a mineral that consists of a brittle silicate of beryllium and aluminum in pale yellow, green, or blue prismatic crystals and is used especially as a gemstone

First Known Use of euclase

1804, in the meaning defined above

History and Etymology for euclase

French, from eu- (from Latin) + Greek klasis breaking, from klan to break

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The first known use of euclase was in 1804

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