WordWeb Online

1. The opening of a subject to widespread discussion and debate
   - airing, public exposure, spreading
    
2. The property of being diffused or dispersed
   - diffusion
    
3. The act of dispersing or diffusing something
   "the dissemination of the troops";
   - dispersion, dispersal, diffusion

Derived forms: disseminations

Type of: dispersion, distribution, spread, spreading, transmission

Encyclopedia: Dissemination