The Collaborative International Dictionary of English v.0.48:

Anabolic \An`a*bol"ic\, a. [Gr. ? something heaped up; ? + ? a
   stroke.] (Physiol.)
   Pertaining to anabolism; an anabolic changes, or processes,
   more or less constructive in their nature.
   [1913 Webster]

WordNet (r) 3.0 (2006):

anabolic
    adj 1: of or related to the synthetic phase of metabolism
    2: characterized by or promoting constructive metabolism; "some
       athletes take anabolic steroids to increase muscle size
       temporarily" [ant: catabolic, katabolic]