The Collaborative International Dictionary of English v.0.48:

katabolic \kat`a*bol"ic\, a. (Physiol.)
   Of or pertaining to catabolism; same as catabolic.
   [1913 Webster + PJC]

The Collaborative International Dictionary of English v.0.48:

catabolic \catabolic\ adj. [Formerly spelled katabolic.]
   1. Of or pertaining to catabolism; as, catabolic processes,
      which give rise to substances (katastates) of decreasing
      complexity and increasing stability.
      [1913 Webster + WordNet 1.5]

   2. characterized by destructive metabolism; contrasted with
      anabolic.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

katabolic
    adj 1: relating to or characterized by catabolism [syn:
           catabolic, katabolic]
    2: characterized by destructive metabolism [syn: catabolic,
       katabolic] [ant: anabolic]