{ Biogenesis (&unr_;), Biogeny (&unr_;), } n. [Gr. bios life + &unr_;, &unr_;, 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; -- called also biogeny; -- opposed to abiogenesis. (b) Life development generally.
[1913 Webster]

2. the production of a chemical compound by a living organism.
Syn. -- biosynthesis.
[WordNet 1.5]