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  • Webster's Revised Unabridged Dictionary
    • n Polygenesis (Biol) The theory that living organisms originate in cells or embryos of different kinds, instead of coming from a single cell; -- opposed to monogenesis.
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Century Dictionary and Cyclopedia
    • polygenesis In 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.
    • n polygenesis Origination or derivation from more than one species, or, in a very restricted sense, from more than one pair: contrasted with monogenesis. Compare polyphylesis.
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Chambers's Twentieth Century Dictionary
    • n Polygenesis pol-i-jen′e-sis origin from many separate germs: the theory that organisms sprang from different cells
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Webster's Revised Unabridged Dictionary
Poly-, + genesis, or root of Gr. gi`gnesqai to be born