boart


noun Mineralogy.

  1. bort.

noun

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

noun

  1. a variant spelling of bort

noun

  1. an inferior grade of diamond used for cutting and drilling or, in powdered form, as an industrial abrasive
n.

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

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