Source : Webster's Revised Unabridged Dictionary (1913)

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.

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

   3. Antic tricks or motions. --B. Jonson.

Source : WordNet®

gesticulation
     n : a deliberate and vigorous gesture or motion