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

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "gesticulation":
   bearing, beck, beckon, body language, carriage, charade, chironomy,
   dactylology, deaf-and-dumb alphabet, dumb show, gesture,
   gesture language, hand signal, kinesics, motion, movement,
   pantomime, poise, pose, posture, shrug, sign language, stance