| 释义 |
bort|bɔːt|
Also 7 bourt, 9 boart.
[Possibly a. OF. bord, bort, bastard; the word is used in mod.F. (Littré, supplement) as bord and bort, but is not in Cotgr. 1611.]
The fragments removed from diamonds in cutting, when too small for jewellery; also diamonds of too coarse a quality for jewellery: used to make diamond powder.
1622Malynes Anc. Law-Merch. 74 The Flat Diamonds, which are in the superficies of the Bourt of Diamonds, and are impure, commonly beaten therefore into powder for the vse of the other Diamonds, that are cut and polished by the Millne. 1698Fryer Acc. E. India & P. iii. iii. 113 A flat Press, where under Steel-wheels the Diamonds are fastned; and with its own Bort are worn into what Cut the Artist pleases. 1817Jas. Mill Brit. India I. ii. viii. 353 In a flat press, where under steel wheels, the diamonds are fastened, and with its own bort are worn into what cut the artist pleases. 1884F. J. Britten Watch & Clockm. 129 Drills are selected from needle-shaped pieces of bort. 1959Times 18 Nov. 21/1 The diamonds produced in the laboratory..are similar to so called boart or abrasive grit. |