1. having the same evolutionary origin but not necessarily the same function
; - Example: "the wing of a bat and the arm of a man are homologous"
2. corresponding or similar in position or structure or function or characteristics
; especially derived from an organism of the same species
; - Example: "a homologous tissue graft"
The Collaborative International Dictionary of English v.0.48:
Homologous \Ho*mol"o*gous\, a. [Gr. ? assenting, agreeing; ? the
same + ? speech, discourse, proportion, ? to say, speak.]
Having the same relative position, proportion, value, or
(a) (Geom.) Corresponding in relative position and
In similar polygons, the corresponding sides,
angles, diagonals, etc., are homologous. --Davies &
(b) (Alg.) Having the same relative proportion or value, as
the two antecedents or the two consequents of a
(c) (Chem.) Characterized by homology; belonging to the same
type or series; corresponding in composition and
properties. See Homology, 3.
(d) (Biol.) Being of the same typical structure; having like
relations to a fundamental type to structure; as, those
bones in the hand of man and the fore foot of a horse are
homologous that correspond in their structural relations,
that is, in their relations to the type structure of the
fore limb in vertebrates.
Homologous stimulus. (Physiol.) See under Stimulus.
WordNet (r) 3.0 (2006):
adj 1: having the same evolutionary origin but not necessarily
the same function; "the wing of a bat and the arm of a
man are homologous" [ant: analogous, heterologic,
2: corresponding or similar in position or structure or function
or characteristics; especially derived from an organism of
the same species; "a homologous tissue graft" [ant:
Moby Thesaurus II by Grady Ward, 1.0:
22 Moby Thesaurus words for "homologous":
analogous, answering, approximate, approximating, approximative,
close, coequal, comparable, complemental, complementary,
correspondent, corresponding, equipollent, equivalent, like, near,
proximate, reciprocal, reciprocative, relatable, similar,