Source : Webster's Revised Unabridged Dictionary (1913)

Anabolism \A*nab"o*lism\, n. (Physiol.)
   The constructive metabolism of the body, as distinguished
   from katabolism.

Source : WordNet®

anabolism
     n : synthesis of more complex substances from simpler ones [syn:
          {constructive metabolism}] [ant: {catabolism}]