pulsatory

Tradition had taught that arteries had an active "pulsatory force", but Harvey realised they were passive, like the lead pipes of London's rapidly developing water system.

It is evident that a pulsatory as well as an alternating current might be used to drive or operate the motors above described.

Systaltic, sis-tal′tik, adj. alternately contracting and dilating, pulsatory.

Then he touched a valve, and the machine became animate with a low pulsatory wheezing, while something commenced to hum and rattle inside it.

The odds and ends on the table beside him were rattling merrily, and a deep pulsatory humming rang stridently through the silence of the swamps.