The Collaborative International Dictionary of English v.0.48:

algorithmic \algorithmic\ adj.
   1. of or pertaining to an algorithm. recursive
      [1913 Webster]

   2. definitively solvable by a finite number of steps; -- said
      of mathematical or logical problems. Contrasted with
      heuristic.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

algorithmic
    adj 1: of or relating to or having the characteristics of an
           algorithm [ant: heuristic]