\Bi`o*gen"e*sis\, Biogeny \Bi*og"e*ny\, n. [Gr. ?
life + ?, ?, birth.] (Biol.)
(a) A doctrine that the genesis or production of living
    organisms can take place only through the agency of
    living germs or parents; -- opposed to {abiogenesis}.
(b) Life development generally.