or boart, bortz
- low-quality diamond, in granular aggregate or small fragments, valuable only in crushed or powdered form, especially for industrial use as an abrasive.
Origin of bort
1615–25; apparently metathetic variant of *brot (Old English gebrot fragment); akin to Middle English brotel brittle, Old Norse brot fragment
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for bortz
Historical Examples of bortz
Such drills, set with bortz diamonds, have accomplished remarkable feats.Inventors at Work
boart bortz (bɔːts)
- an inferior grade of diamond used for cutting and drilling or, in powdered form, as an industrial abrasive
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 bortz
"waste diamonds, small chips from diamond-cutting," of unknown origin, perhaps related to Old French bort "bastard."
Online Etymology Dictionary, © 2010 Douglas Harper