nPolygenesis(Biol) The theory that living organisms originate in cells or embryos of different kinds, instead of coming from a single cell; -- opposed to monogenesis.
Century Dictionary and Cyclopedia
polygenesisIn biology, generation or origination from several separate and independent germs; the doctrine that organisms took rise from cells or embryos of different kinds. It is akin, as a biological theory, to the notion of special creations, and in its application to man is commonly called polygeny.
npolygenesisOrigination or derivation from more than one species, or, in a very restricted sense, from more than one pair: contrasted with monogenesis. Compare polyphylesis.
Chambers's Twentieth Century Dictionary
nPolygenesispol-i-jen′e-sis origin from many separate germs: the theory that organisms sprang from different cells
Webster's Revised Unabridged Dictionary
Poly-, + genesis, or root of Gr. gi`gnesqai to be born