Noah Webster
Propagation
PROPAGA'TION, noun [Latin propagatio.]
1. The act of propagating; the continuance or multiplication of the kind by generation or successive production; as the propagation of animals or plants.
There is not in nature any spontaneous generation, but all come by propagation
2. The spreading or extension of any thing; as the propagation of sound or of reports.
3. The spreading of any thing by planting and establishing in places before destitute; as the propagation of the gospel among pagans.
4. A forward or promotion.