po·lo /ˈpo(ˌ)lo/
  馬球,水球
  Po·lo n.  A Spanish gypsy dance characterized by energetic movements of the body while the feet merely shuffle or glide, with unison singing and rhythmic clapping of hands.
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  Po·lo n.
  1. A game of ball of Eastern origin, resembling hockey, with the players on horseback.
  2. A similar game played on the ice, or on a prepared floor, by players wearing skates.
  3. A game similar to hockey played by swimmers.
  Polo
       n 1: Venetian traveler who explored Asia in the 13th century and
            served Kublai Khan (1254-1324) [syn: Marco Polo]
       2: a game similar to field hockey but played on horseback using
          long-handled mallets and a wooden ball