Driving wheel

from WordNet (r) 3.0 (2006)
driving wheel
    n 1: a wheel that drives a motor vehicle (transforms torque into
         a tractive force)
    
from The Collaborative International Dictionary of English v.0.48
Driving \Driv"ing\, a.
   1. Having great force of impulse; as, a driving wind or
      storm.
      [1913 Webster]

   2. Communicating force; impelling; as, a driving shaft.
      [1913 Webster]

   {Driving axle}, the axle of a driving wheel, as in a
      locomotive.

   {Driving box} (Locomotive), the journal box of a driving
      axle. See Illust. of {Locomotive}.

   {Driving note} (Mus.), a syncopated note; a tone begun on a
      weak part of a measure and held through the next accented
      part, thus anticipating the accent and driving it through.
      

   {Driving spring}, a spring fixed upon the box of the driving
      axle of a locomotive engine to support the weight and
      deaden shocks. [Eng.] --Weale.

   {Driving wheel} (Mach.), a wheel that communicates motion;
      one of the large wheels of a locomotive to which the
      connecting rods of the engine are attached; -- called
      also, simply, driver. See Illust. of {Locomotive}.
      [1913 Webster]
    

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