bull wheel


: the main driving wheel or gear of a machine, usually the largest and strongest wheel in the train of mechanism, in some machines (such as a shaper) transmitting the power received by the machine to the various mechanisms, in others (such as a tractor) delivering to the driving wheels the power transmitted to it from the motor
: a drum on which a rope is wound for hauling or lifting something (such as logs or well-boring tools)
: a wheel attached to the boom of a derrick at the base and used to swing the boom about a vertical axis

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Dictionary Entries Near bull wheel

Cite this Entry

“Bull wheel.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bull%20wheel. Accessed 4 Oct. 2023.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!