{ Pol`y*gen"e*sis (-jĕn"ē*sĭs),
Po*lyg"e*ny (p?*lĭj"ē*n?), }
n. [Poly- + genesis, or root of Gr.
gi`gnesqai to be born.] (Biol.)The theory that
living organisms originate in cells or embryos of different kinds,
instead of coming from a single cell; -- opposed to
monogenesis.