[1] : The Collaborative International Dictionary of English v.0.48

biosynthesis \biosynthesis\ n.
   1. production of a chemical compound by a living organism.

   syn: biogenesis.
        wordnet 1.5

   2. the production of chemical substances by use of reagents
      or enzymes derived from living organisms, in reactions
      modeled on those observed in living organisms.
      pjc

[2] : WordNet (r) 2.0

biosynthesis
     n : production of a chemical compound by a living organism syn:
          biogenesis
see also:
biogenesis 

Biosynthesis >> B Words
Biosynthesis, definition of term: Biosynthesis
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