pulsation in WordNet English dictionary

1. the rhythmic contraction and expansion of the arteries with each beat of the heart
   "he could feel the beat of her heart"
   pulse  pulsation  heartbeat  beat 
   
2. (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"
   pulsation  pulsing  pulse  impulse 
   
3. a periodically recurring phenomenon that alternately increases and decreases some quantity
   pulsation