PROPAGATOR
propagator, disseminator
(noun) someone who spreads the news
propagator
(noun) someone who propagates plants (as under glass)
Source: WordNet® 3.1
Etymology
Noun
propagator (plural propagators)
A person who disseminates news or rumour
A person who propagates plants
A covered, sometimes heated container for germinating seeds or raising seedlings
(physics) A function that represents the quantum propagation of a subatomic particle
Source: Wiktionary
Prop"a*ga`tor, n. Etym: [L.: cf. F. propagateur.]
Definition: One who propagates; one who continues or multiplies.
Source: Webster’s Unabridged Dictionary 1913 Edition