bortz

名词 n.
中文释义

英文释义

名词 n.
  1. Diamond of inferior quality, commonly used for drill tips; abrasive diamond powder; bort. uncountable
    — 1906 September, X-Rays and a Diamond Thief, Popular Mechanics, page 932, It is also noticeable that the black diamond, No. 20, a dull and lusterless substance, is as transparent to the X-rays as the brilliants, while the diamond bortz, No. 6, is much less transparent than either, though more so than the imitation, No 19.

词形变化

boart alternative bort alternative
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