to beat with a pulse
to throb or move rhythmically; to vibrate
in physics and astronomy, to vary in brightness, magnitude, etc
pulsatile /ʹpulsətiel/ adj
pulsation /-sh(ə)n/ noun
pulsative /ʹpulsətiv/ adj
pulsatory /ʹpulsət(ə)ri, pulʹsaytəri/ adj
[Latin pulsatus, past part. of pulsare, from pulsus, past part. of pellere to drive, push, beat]