bull wheel.
any large driving gear among smaller gears.


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  • Bull-gun

    a target rifle with a heavy barrel.

  • Bullhead

    any of several North American, freshwater catfishes of the genus Ictalurus, having a rounded or truncate caudal fin. any of several other fishes, as the freshwater sculpins of the genus Cottus, especially those species having a hornlike spine on each side of the head. an obstinate or stupid person. Historical Examples Held for Orders Frank […]

  • Bullheaded

    obstinately opinionated, especially in refusing to consider alternatives; stubborn. Historical Examples The Penal Cluster Ivar Jorgensen (AKA Randall Garrett) The World of Homer Andrew Lang Still Jim Honor Willsie Morrow

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    Also called bullnose header. a brick having one of the edges across its width rounded for laying as a header in a sill or the like. a brick laid on edge as a header, as in a rowlock.

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