Polygenesis
Pronunciation : Pol`y*gen"e*sis, Po*lyg"e*ny
Part of Speech : n.
Etymology : [Poly- + genesis, or root of Gr. (Biol.)
Definition : Defn: The theory that living organisms originate in cells or embryos of different kinds, instead of coming from a single cell; -- opposed to monogenesis.
Source : Webster's Unabridged Dictionary, 1913