Other forms: pulsations
Pulsation is a throbbing, repeating rhythm, like the pulsation of your blood in your ears when you're running or the pulsation of music in a loud dance club.
The pulsation of your heart is what pumps blood through your body — it moves rhythmically, expanding and contracting. Anything that throbs this way is also pulsation, like the when the car stereo is turned up so loud you can feel the beat of the music through the soles of your feet. Pulsation comes from the Latin pulsationem, "a beating or striking," and its root meaning "to thrust, strike, or drive."