homologous

homologous
/heuh mol"euh geuhs, hoh-/, adj.
1. having the same or a similar relation; corresponding, as in relative position or structure.
2. corresponding in structure and in origin, but not necessarily in function: The wing of a bird and the foreleg of a horse are homologous.
3. having the same alleles or genes in the same order of arrangement: homologous chromosomes.
4. Chem. of the same chemical type, but differing by a fixed increment of an atom or a constant group of atoms: Methyl and ethyl alcohols are homologous.
5. Immunol. pertaining to an antigen and its specific antibody.
[1650-60; < ML homologus < Gk homólogos agreeing, equiv. to homo- HOMO- + -logos proportional, equiv. to log- (s. of lógos proportion; see LOGOS) + -os -OUS]

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Universalium. 2010.

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  • 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… …   The Collaborative International Dictionary of English

  • homologous — [hō mäl′ə gəs] adj. [Gr homologos, agreeing < homos, SAME + legein, say: see LOGIC] 1. corresponding in structure, position, character, etc.: opposed to HETEROLOGOUS 2. Biol. corresponding in basic type of structure and deriving from a common… …   English World dictionary

  • homologous — homologous. См. гомологичный. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • homologous — index analogous, coequal, coextensive, cognate, comparable (capable of comparison), equal Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • homologous — 1650s, from Gk. homologos agreeing, of one mind, from homos same (see HOMO (Cf. homo ) (1)) + logos relation, reasoning, computation, related to legein reckon, select, speak (see LECTURE (Cf. lecture) (n.)) …   Etymology dictionary

  • homologous — ► ADJECTIVE 1) having the same relation, relative position, or structure. 2) Biology (of organs) similar in position, structure, and evolutionary origin. DERIVATIVES homologize (also homologise) verb homology noun. ORIGIN Greek homologos agreeing …   English terms dictionary

  • homologous — adjective Showing a degree of correspondence or similarity. : Corresponding to a similar structure in another life form with a common evolutionary origin. :, : Lobules, homologous in structure, recur again only in the Gondwanalandic families… …   Wiktionary

  • Homologous — The relationship between two chromosomes that are paired and so are homologs of each other. * * * Corresponding or alike in certain critical attributes. 1. In biology or zoology, denoting organs or parts corresponding in evolutionary origin and… …   Medical dictionary

  • homologous — adjective Etymology: Greek homologos agreeing, from hom + legein to say more at legend Date: 1660 1. a. having the same relative position, value, or structure: as (1) exhibiting biological homology (2) having the same or allelic genes with… …   New Collegiate Dictionary

  • homologous — (1) Derived from the tissues or DNA of a member of the same species. cf heterologous, autologous, homologous recombination. (2) Of genes, similar in sequence, cf. analogous …   Dictionary of molecular biology

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