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1. Poorly crystallized diamonds used for industrial cutting and abrasion.
2. A carbonado.

[Probably from Dutch boort, tiny waste diamond pieces produced in the gem cutting process, bort , probably from Old French bourt, bastard, from Late Latin burdus, hinny, probably of Celtic origin; akin to Burdō and Burdōnus, ancient Celtic masculine personal names derived from a word for a donkey or mule, animals admired for their robustness.]

bort′y adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(bɔːt) or




(Elements & Compounds) 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]
ˈborty adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014



low-quality diamond, in granular aggregate or small fragments, valuable only in crushed or powdered form as an abrasive.
[1615–25; appar. metathetic variant of *brot (Old English gebrot fragment)]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Jennifer Bort Yacovissi's command of language and history make for fluid and tactile reading.
I know Joan (Barreda Bort) was pushing, but to push and not to make a mistake is a fine balance."
Joan Barreda Bort of Spain was two minutes back in third.
O gannoedd o ymgeiswyr i drideg pedwar o gyfweliadau, dyma'r deg: Ryan Quick o Bort Talbot; Polu Uhi o Tonga; Cisa Borsey o Ddinbych; Danielle Thomas o Wrecsam; Sarah Hattle o Lee-on-the-Solent; Alun Rhys Jones o Brestatyn; Tom Workman o Gaerdydd; Liz Roberts o Lyn-nedd; Ludo Dieumegard o Lydaw, a Gayle Lister o Reading.
Another digital OOH sup- porter is Michel Bort, Kassab Media's client services direc- tor.
Ffeit Gyntaf Amy (S4C, 9.30pm) Mae gan Amy Williams o Bort Talbot ddwy freuddwyd.
In her first solo show in New York, the artist best known for sublime red paintings corrupted by the logo of fashion designer Andre Courreges installed a spare suite of four paintings of gemstones: Beryl, 21; Corundum 19 (Sapphire Gray Scale); Padparadscha 40; and Carbon 17 (Bort Diamond) (all works 2004).
Last night, Stefan Bort, group company secretary of George Wimpey plc, said: "We are satisfied with the outcome.
(3) For an excellent description of EDI technology and its use in various business processes, see Richard Bort and Gerald Beilfeldt, Handbook of EDI, New York: Warren, Gorham and Lamont, 1994.