11 May 2016

homologous

[huh-mol-uh-guh s, hoh-]

adjective

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. 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.
5. Immunology. pertaining to an antigen and its specific antibody.

Origin of homologous
Medieval Latin, Greek
1650-1660; < Medieval Latin homologus < Greek homólogos agreeing, equivalent to homo- homo- + -logos proportional, equivalent to log- (stem of lógos proportion; see logos ) + -os -ous

Related forms

nonhomologous, adjective
unhomologous, adjective

Dictionary.com

Examples from the Web for homologous

Historical Examples

First, correlation of growth: homologous organs tend to vary in the same direction, and together.
Appletons’ Popular Science Monthly, March 1899
Various

homologous reactions are arbitrarily valued as 100 per cent, and heterologous reactions are expressed accordingly.
Myology and Serology of the Avian Family Fringillidae
William B. Stallcup

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Today’s quote

The thermometer of success is merely the jealousy of the malcontents.

– Salvador Dali

On this day

11 May – World Keffiyeh Day, in solidarity with Palestine.

11 May 1904 – birth of Salvador Dali, Spanish surrealist painter. Died 23 January 1989.

11 May 1981 – death of Bob Marley, Jamaican reggae singer and musician. Born 6 February 1945.

11 May 1985 – death of Chester Gould, American creator of the cartoon strip, ‘Dick Tracy’. He drew the comic strip from 1931 to 1977. Born 20 November 1900.