The Collaborative International Dictionary of English v.0.48:

Pulsation \Pul*sa"tion\, n. [L. pulsatio a beating or striking:
   cf. F. pulsation.]
   1. (Physiol.) A beating or throbbing, especially of the heart
      or of an artery, or in an inflamed part; a beat of the
      pulse.
      [1913 Webster]

   2. A single beat or throb of a series.
      [1913 Webster]

   3. A stroke or impulse by which some medium is affected, as
      in the propagation of sounds.
      [1913 Webster]

   4. (Law) Any touching of another's body willfully or in
      anger. This constitutes battery.
      [1913 Webster]

            By the Cornelian law, pulsation as well as
            verberation is prohibited.            --Blackstone.
      [1913 Webster]

WordNet (r) 3.0 (2006):

pulsation
    n 1: (electronics) a sharp transient wave in the normal
         electrical state (or a series of such transients); "the
         pulsations seemed to be coming from a star" [syn:
         pulsation, pulsing, pulse, impulse]
    2: a periodically recurring phenomenon that alternately
       increases and decreases some quantity
    3: the rhythmic contraction and expansion of the arteries with
       each beat of the heart; "he could feel the beat of her heart"
       [syn: pulse, pulsation, heartbeat, beat]