oligoclase


ol·i·go·clase

noun \ˈä-li-gō-ˌklās, ˈō-, -ˌklāz; ə-ˈli-gə-\

Definition of OLIGOCLASE

:  a mineral of the plagioclase series

Origin of OLIGOCLASE

German Oligoklas, from olig- olig- + Greek klasis breaking, from klan to break — more at clast
First Known Use: 1832

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