dis·sem·i·na·tion \də̇ˌseməˈnāshən\noun (-s) Etymology: Latin dissemination-, disseminatio, from disseminatus + -ion-, -io -ion : the action or process of disseminating : the state of being disseminated : diffusion < the dissemination of ideas > < devoted himself to the dissemination of a modified form of Darwinism — S.F.Mason >