[huh-mol-uh-guh s, hoh-] /həˈmɒl ə gəs, hoʊ-/
having the same or a similar relation; corresponding, as in relative position or structure.
corresponding in structure and in origin, but not necessarily in function:
The wing of a bird and the foreleg of a horse are homologous.
having the same alleles or genes in the same order of arrangement:
Chemistry. 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.
Immunology. pertaining to an antigen and its specific antibody.
having a related or similar position, structure, etc
(chem) (of a series of organic compounds) having similar characteristics and structure but differing by a number of CH2 groups
(biology) (of organs and parts) having the same evolutionary origin but different functions: the wing of a bat and the paddle of a whale are homologous Compare analogous (sense 2)
(maths) (of elements) playing a similar role in distinct figures or functions
1650s, from Greek homologos “agreeing, of one mind,” from homos “same” (see homo- (1)) + logos “relation, reasoning, computation,” related to legein “reckon, select, speak” (see lecture (n.)).
homologous ho·mol·o·gous (hə-mŏl’ə-gəs, hō-)
- Homologous chromosome
noun one of a pair of chromosomes that match up at meiosis and are identical in morphology and arrangement; a chromosome with the same gene sequence as another, each derived from one parent homologous chromosome n. Either member of a single pair of chromosomes.
- Homologous chromosomes
plural noun 1. two chromosomes, one of paternal origin, the other of maternal origin, that are identical in appearance and pair during meiosis homologous chromosomes [(huh-mol-uh-guhs)] A pair of matching chromosomes in an organism, with one being inherited from each parent.
- Homologous graft
homologous graft n. See allograft.
- Homologous stimulus
homologous stimulus n. A stimulus acting only upon nerve terminations in a special sense organ.