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ballrace

From Wiktionary, the free dictionary

English

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Etymology

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Fromball +‎race.

Noun

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ballrace (pluralballraces)

  1. A friction-reducing device consisting of aring containing freely-revolvingball bearings
    • 1971, Gwen White,Antique Toys And Their Background, page128:
      Home-made scooters could be special affairs made in carpenters' shops, or they could be made by boys with two rough-hewn pieces of wood put together withball-races for the wheels.

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