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]

Moby Thesaurus II by Grady Ward, 1.0:

85 Moby Thesaurus words for "pulsation":
   alternation, arrhythmia, bar beat, barrage, beat, beating,
   ceaselessness, chattering, constancy, constant flow, continualness,
   continuity, cyclicalness, downbeat, drum, drum music, drumbeat,
   drumfire, drumming, flutter, heartbeat, heartthrob, incessancy,
   intermittence, intermittency, meter, noninterruption, offbeat,
   oscillation, palpitation, paradiddle, patter, pendulum motion,
   periodicalness, periodicity, perpetuity, piston motion, pitapat,
   pitter-patter, pound, pounding, pulse, quick fire, rapid fire,
   rapid recurrence, rapid succession, rapidity, rat-a-tat, rat-tat,
   rat-tat-tat, rataplan, rattattoo, reappearance, recurrence,
   regular wave motion, regularity, reoccurrence, repetition, return,
   rhythm, roll, rub-a-dub, ruff, ruffle, seasonality, spatter,
   splutter, sputter, staccato, steadiness, stuttering, sustainment,
   tat-tat, tattoo, tempo, throb, throbbing, thrum, thumping, tom-tom,
   undulation, unintermission, uninterruption, upbeat, vibration