Homologue \Hom"o*logue\, n. [Cf. F. homologue. See
{Homologous}.]
That which is homologous to something else; as, the
corresponding sides, etc., of similar polygons are the
homologues of each other; the members or terms of an
homologous series in chemistry are the homologues of each
other; one of the bones in the hand of man is the homologue
of that in the paddle of a whale.
[1913 Webster]