pulsation (
http://definr.com/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:
pulsing,
pulse,
impulse]
2: the rhythmic contraction and expansion of the arteries with
each beat of the heart; "he could feel the beat of her
heart" [syn:
pulse,
heartbeat,
beat]