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bull wheel

noun, Machinery
any large driving gear among smaller gears.
Also called bull gear.
Origin of bull wheel
1820-30, Americanism Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for bull-wheel
Historical Examples
  • The big graft in this neck-a woods is political, and the Red Tower gang is only set-a cogs in the bull-wheel.

    The Wreckers Francis Lynde

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