The Collaborative International Dictionary of English v.0.48:

Gesticulation \Ges*tic`u*la"tion\, n. [L. gesticulatio: cf. F.
   gesticulation.]
   1. The act of gesticulating, or making gestures to express
      passion or enforce sentiments.
      [1913 Webster]

   2. A gesture; a motion of the body or limbs in speaking, or
      in representing action or passion, and enforcing arguments
      and sentiments. --Macaulay.
      [1913 Webster]

   3. Antic tricks or motions. --B. Jonson.
      [1913 Webster]

WordNet (r) 3.0 (2006):

gesticulation
    n 1: a deliberate and vigorous gesture or motion