The Collaborative International Dictionary of English v.0.48:

Bull \Bull\, a.
   Of or pertaining to a bull; resembling a bull; male; large;
   fierce.
   [1913 Webster]

   Bull bat (Zool.), the night hawk; -- so called from the
      loud noise it makes while feeding on the wing, in the
      evening.

   Bull calf.
   (a) A stupid fellow.

   Bull mackerel (Zool.), the chub mackerel.

   Bull pump (Mining), a direct single-acting pumping engine,
      in which the steam cylinder is placed above the pump.

   Bull snake (Zool.), the pine snake of the United States.

   Bull stag, a castrated bull. See Stag.

   Bull wheel, a wheel, or drum, on which a rope is wound for
      lifting heavy articles, as logs, the tools in well boring,
      etc.
      [1913 Webster]