pulsation

Noun

• the rhythmic contraction and expansion of the arteries with each beat of the heart
  • he could feel the beat of her heart
    

• a periodically recurring phenomenon that alternately increases and decreases some quantity

• (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
    

Related words

• Synonyms: 
  pulse , heartbeat , beat , pulsing , impulse