D defs.my
Entry 2 senses Webster, 1913

Propagation

/präpˌ-əg-āsh'-ən/ · Prop·a·ga·tion · IPA /pɹɑpəˈɡeɪʃən/
01 n. The act of propagating; continuance or multiplication of the kind by generation or successive production; as, the propagation of animals or…
  1. 1.
    The act of propagating; 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.” Ray.
  2. 2.
    The spreading abroad, or extension, of anything; diffusion; dissemination; as, the propagation of sound; the propagation of the gospel.