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1. WordNet® 3.0 (2006)
homologous
    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,
           heterological, heterologous]
    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:
       autologous, heterologous]

2. 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
   structure. Especially:
   (a) (Geom.) Corresponding in relative position and
       proportion.
       [1913 Webster]

             In similar polygons, the corresponding sides,
             angles, diagonals, etc., are homologous. --Davies &
                                                  Peck (Math.
                                                  Dict.).
   (b) (Alg.) Having the same relative proportion or value, as
       the two antecedents or the two consequents of a
       proportion.
   (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.
       [1913 Webster]

   Homologous stimulus. (Physiol.) See under Stimulus.
      [1913 Webster]

Thesaurus Results for homologous:

1. Moby Thesaurus II by Grady Ward, 1.0
analogous, answering, approximate, approximating, approximative, close, coequal, comparable, complemental, complementary, correspondent, corresponding, equipollent, equivalent, like, near, proximate, reciprocal, reciprocative, relatable, similar, tantamount
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