1.  One whose trade it is to grind knives and cutting-tools, esp. in the process of making these; also, an itinerant grinder or sharpener of knives and scissors.

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1611.  Florio, Arruotatore, a sheare or knife grinder.

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1797.  Canning, Knife-Grinder, iii. Tell me, Knife-grinder, how you came to grind knives?

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1813.  Examiner, 16 May, 317/2. Tricks that are called nervous,—such as … playing the knife-grinder with your leg.

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1878.  W. T. Harris, in N. Amer. Rev., CXXVII. 265. The case of the Sheffield knife-grinders.

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  2.  A grind-stone, emery-wheel, or other appliance for grinding steel cutting tools.

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1875.  in Knight, Dict. Mech.

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  3.  a. A name for a species of cicada. b. The Nightjar or Goatsucker (Cent. Dict.); see GRINDER 7.

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1859.  Tennent, Ceylon (1860), I. 267. The cicada … makes the forest re-echo with a long sustained noise so curiously resembling that of a cutler’s wheel that … it has acquired the highly appropriate name of the knife-grinder.

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