- 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
- (in mineralogy) indicating a particular type of cleavageplagioclase
via French from Greek klasis a breaking, from klan to break
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