from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Derivation of a species or type from more than one ancestor or germ cell.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The genesis of a species from more than one ancestor.
- n. The theory that living organisms originate in cells or embryos of different kinds, instead of coming from a single cell; as opposed to monogenesis.
- n. The theory that languages developed independently in different places at different periods, as opposed to originating from a single source.
from the GNU version of the Collaborative International Dictionary of English
- n. The theory that living organisms originate in cells or embryos of different kinds, instead of coming from a single cell; -- opposed to
from The Century Dictionary and Cyclopedia
- In biology, generation or origination from several separate and independent germs; the doctrine that organisms took rise from cells or embryos of different kinds.
- n. Origination or derivation from more than one species, or, in a very restricted sense, from more than one pair: contrasted with monogenesis. Compare polyphylesis.
poly- + -genesis (Wiktionary)