inspirator
noun
in·spi·ra·tor ˈin(t)-spə-ˌrā-tər 
-(ˌ)spi-
: one that inspires
teachers who are inspirators of the young
Word History
First Known Use
1624, in the meaning defined above
Medical Definition
inspirator
noun
in·spi·ra·tor ˈin(t)s-pə-ˌrāt-ər, -(ˌ)pir-ˌāt-
: a device (as an injector or respirator) by which something (as gas or vapor) is drawn in