Source : Webster's Revised Unabridged Dictionary (1913)

Paddock \Pad"dock\, n. [OE. padde toad, frog + -ock; akin to D.
   pad, padde, toad, Icel. & Sw. padda, Dan. padde.] (Zo["o]l.)
   A toad or frog. --Wyclif. ``Loathed paddocks.'' --Spenser

   {Paddock pipe} (Bot.), a hollow-stemmed plant of the genus
      {Equisetum}, especially {E. limosum} and the fruiting
      stems of {E. arvense}; -- called also {padow pipe} and
      {toad pipe}. See {Equisetum}.

   {Paddock stone}. See {Toadstone}.

   {Paddock stool} (Bot.),a toadstool.

Paddock \Pad"dock\, n. [Corrupted fr. parrock. See {Parrock}.]
   1. A small inclosure or park for sporting. [Obs.]

   2. A small inclosure for pasture; esp., one adjoining a
      stable. --Evelyn. Cowper.

Source : WordNet®

paddock
     n : pen where racehorses are saddled and paraded before a race