The Collaborative International Dictionary of English v.0.48:

Homological \Ho`mo*log"ic*al\, a.
   Pertaining to homology; having a structural affinity
   proceeding from, or base upon, that kind of relation termed
   homology. -- Ho`mo*log"ic*al*ly, adv.
   [1913 Webster]

WordNet (r) 3.0 (2006):

homological
    adj 1: similar in evolutionary origin but not in function [syn:
           homologic, homological]