Lewis Short
prōpāgātor (noun M) : 1. propago
* A propagator; trop., an enlarger, extender (class.): provinciae propagator,Cic. Att. 8, 3, 3 (al. prorogator).—An epithet of Jupiter, as the enlarger of boundaries, App. de Mundo, p. 75, 10: ORBIS AC REI PUBLICAE ROMANAE,Inscr. Grut. 271, 4.
Charlton T. Lewis, Charles Short, A Latin Dictionary