"pulsation" in the noun sense
1. pulsation, pulsing, pulse, impulse
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"
2. pulsation
a periodically recurring phenomenon that alternately increases and decreases some quantity
3. pulse, pulsation, heartbeat, beat
the rhythmic contraction and expansion of the arteries with each beat of the heart
"he could feel the beat of her heart"
Source: WordNet® (An amazing lexical database of English)
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