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-clase

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  1. a combining form used in the formation of compound words that denote minerals with a particular cleavage, as specified by the initial element: oligoclase; plagioclase.

Origin of -clase

< French < Greek klásis; see -clasis
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for -clase

-clase

n combining form
  1. (in mineralogy) indicating a particular type of cleavageplagioclase

Word Origin

via French from Greek klasis a breaking, from klan to break
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012