pulsations

plural of pulsation

(countable, uncountable) The regular throbbing of the heart, an artery etc. in a living body; the pulse.
(countable, uncountable) Any rhythmic beating, throbbing etc.
(countable, uncountable) The rhythmic increase and decrease of size in naked zoospores and plasmodia.
(archaic, countable, uncountable) Physical striking; a blow.
(countable, uncountable) A single beat, throb or vibration.