Disseminating Information on Disseminate

While the object of the verb disseminate may be something tangible, such as an infectious agent, nowadays the thing most often disseminated, or "spread abroad as though sowing seed," is information. Where does this metaphorical verb come from? In Latin, the dis- prefix signifies separation or dispersal, while the -sem- element springs from semen "seed." The same Latin noun is found in a number of other English words with figurative meanings: seminary (which now is a training facility for priests, but initially was a place where seeds were raised to plants), seminal (meaning "containing the seeds of later development"), and yes, the word semen.