noun ol·i·go·clase \ˈä-li-gō-ˌklās, ˈō-, -ˌklāz; ə-ˈli-gə-\

Definition of oligoclase

  1. :  a mineral of the plagioclase series

Origin and Etymology of oligoclase

German Oligoklas, from olig- olig- + Greek klasis breaking, from klan to break — more at clast

First Known Use: 1832

Seen and Heard

What made you want to look up oligoclase? Please tell us where you read or heard it (including the quote, if possible).