polygenesis

Development from more than one source.

In biology, generation or origination from several separate and independent germs; the doctrine that organisms took rise from cells or embryos of different kinds.

Origination or derivation from more than one species, or, in a very restricted sense, from more than one pair: contrasted with monogenesis. Compare polyphylesis.

The theory that living organisms originate in cells or embryos of different kinds, instead of coming from a single cell; — opposed to monogenesis.

The genesis of a species from more than one ancestor.

The theory that living organisms originate in cells or embryos of different kinds, instead of coming from a single cell; as opposed to monogenesis.

The theory that languages developed independently in different places at different periods, as opposed to originating from a single source.