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From The Collaborative International Dictionary of English v.0.48:
Biogenesis \Bi`o*gen"e*sis\, Biogeny \Bi*og"e*ny\, n. [Gr. bi`os 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; -- 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]