/
hɒˈmɒləgəs/
adj.
   - having the same relation, relative position, or structure.
- Biology  similar in position, structure, and evolutionary origin. Often contrasted with analogous. ▸(of chromosomes) pairing at meiosis and having the same structure and pattern of genes. 
- Chemistry  (of a series of chemical compounds) similar in properties but differing in composition by a fixed group of atoms.
Derivative
- homologize
 or homologise v.
- homology
 /hɒˈmɒlədʒi/
 n.
Etymology
C17: via med. L. from Gk homologos ‘agreeing, consistent’, from homos ‘same’ + logos ‘ratio, proportion’.