The Collaborative International Dictionary of English v.0.48:

Biochemistry \Bi`o*chem"is*try\, n. [Gr. bi`os life + E.
   chemistry.] (Biol.)
   The chemistry of living organisms; the chemistry of the
   processes incidental to, and characteristic of, life.
   [1913 Webster] Biodynamic

WordNet (r) 3.0 (2006):

biochemistry
    n 1: the organic chemistry of compounds and processes occurring
         in organisms; the effort to understand biology within the
         context of chemistry

Moby Thesaurus II by Grady Ward, 1.0:

38 Moby Thesaurus words for "biochemistry":
   aerobiology, agrobiology, anatomy, astrobiology, bacteriology,
   biochemics, biochemy, bioecology, biological science, biology,
   biometrics, biometry, bionics, bionomics, biophysics, botany,
   cell physiology, cryobiology, cybernetics, cytology, ecology,
   electrobiology, embryology, enzymology, ethnobiology, exobiology,
   genetics, gnotobiotics, life science, microbiology,
   molecular biology, pharmacology, physiology, radiobiology,
   taxonomy, virology, xenobiology, zoology