or boart, bortz

[ bawrt ]
/ bɔrt /


low-quality diamond, in granular aggregate or small fragments, valuable only in crushed or powdered form, especially for industrial use as an abrasive.
Compare ballas, carbonado2.

Origin of bort

1615–25; apparently metathetic variant of *brot (Old English gebrot fragment); akin to Middle English brotel brittle, Old Norse brot fragment
Related formsbort·y, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for bort

British Dictionary definitions for bort


boart bortz (bɔːts)

/ (bɔːt) /


an inferior grade of diamond used for cutting and drilling or, in powdered form, as an industrial abrasive
Derived Formsborty, adjective

Word Origin for bort

Old English gebrot fragment; related to Old Norse brot piece, Old High German broz bud
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

Word Origin and History for bort



"waste diamonds, small chips from diamond-cutting," of unknown origin, perhaps related to Old French bort "bastard."

Online Etymology Dictionary, © 2010 Douglas Harper