propagation

US /ˌprɑː.pəˈɡeɪ.ʃən/
UK /ˌprɑː.pəˈɡeɪ.ʃən/
1.

伝搬

the breeding of specimens of a plant or animal by natural processes from the parent stock.

:
the propagation of plants by root cuttings
2.

伝搬

the action of widely spreading and promoting an idea, theory, etc.

:
a life devoted to the propagation of the Catholic faith