bortz

bort

[bawrt]
noun
low-quality diamond, in granular aggregate or small fragments, valuable only in crushed or powdered form, especially for industrial use as an abrasive.
Also, boart, bortz [bawrts] .
Compare ballas, carbonado2.


Origin:
1615–25; apparently metathetic variant of *brot (Old English gebrot fragment); akin to Middle English brotel brittle, Old Norse brot fragment

borty, adjective
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World English Dictionary
bort, boart or bortz (bɔːt, bɔːts)
 
n
an inferior grade of diamond used for cutting and drilling or, in powdered form, as an industrial abrasive
 
[Old English gebrot fragment; related to Old Norse brot piece, Old High German broz bud]
 
boart, boart or bortz
 
n
 
[Old English gebrot fragment; related to Old Norse brot piece, Old High German broz bud]
 
bortz, boart or bortz
 
n
 
[Old English gebrot fragment; related to Old Norse brot piece, Old High German broz bud]
 
'borty, boart or bortz
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

bort
"waste diamonds, small chips from diamond-cutting," of unknown origin, perhaps related to O.Fr. bort "bastard."
Online Etymology Dictionary, © 2010 Douglas Harper
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