The Collaborative International Dictionary of English v.0.48:
Disseminator \Dis*sem"i*na`tor\, n. [L.] One who, or that which, disseminates, spreads, or propagates; as, disseminators of disease. [1913 Webster]WordNet (r) 3.0 (2006):
disseminator n 1: someone who spreads the news [syn: propagator, disseminator]