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What is "homologous stimulus"

The Collaborative International Dictionary
Homologous stimulus

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:

  1. (Geom.) Corresponding in relative position and proportion.

    In similar polygons, the corresponding sides, angles, diagonals, etc., are homologous.
    --Davies & Peck (Math. Dict.).

  2. (Alg.) Having the same relative proportion or value, as the two antecedents or the two consequents of a proportion.

  3. (Chem.) Characterized by homology; belonging to the same type or series; corresponding in composition and properties. See Homology, 3.

  4. (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.