The Collaborative International Dictionary of English v.0.48:

Capriole \Cap"ri*ole\, v. i.
   To perform a capriole. --Carlyle.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Capriole \Cap"ri*ole\, n. [F. capriole, cabriole, It. capriola,
   fr. L. caper goat. Cf. Caper, v. i. Cabriole, Caprice,
   Cheveril.]
   1. (Man.) A leap that a horse makes with all fours, upwards
      only, without advancing, but with a kick or jerk of the
      hind legs when at the height of the leap.
      [1913 Webster]

   2. A leap or caper, as in dancing. "With lofty turns and
      caprioles." --Sir J. Davies.
      [1913 Webster]

WordNet (r) 3.0 (2006):

capriole
    n 1: (dressage) a vertical jump of a trained horse with a kick
         of the hind legs at the top of the jump
    2: a playful leap or hop [syn: caper, capriole]
    v 1: perform a capriole, of horses in dressage
    2: perform a capriole, in ballet