Bortz

name, noun

Definitions

Proper Noun
  1. 1
    A surname.
Noun
  1. 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."

Etymology

From the German surname of Low German origin, from a dialectal word meaning "buttocks," ultimately from the root of Bürzel (“rump”).

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