Impulsor

·noun One who, or that which, impels; an Inciter.

impulsor
impulsor (inp-), ōris, m. [impello], one who incites or instigates , an inciter , instigator ...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
impulsor
impulsor (inp-) ōris, m 1 in+1 PAL-, one who incites, an inciter, instigator : Syrus, T.: impulsor...

An Elementary Latin Dictionary