See Also: homologous(dictionary)
Homologous(health)
Homologous(medicine)
transplantation, homologous(medicine)
homologous tumour(medicine)
homologous stimulus(medicine)
homologous serotype(medicine)
homologous series(medicine)
homologous proteins(medicine)
homologous graft(medicine)

homologous (iou)



homologous adjective. M17.
[from medieval Latin homologus from Greek homologos agreeing, consonant, from homos same + logos relation, ratio: see LOGOS, -OUS.]
I. gen.
Having the same relation, structure, relative position, etc.; corresponding. M17.
II. spec.
Math. Of elements (as lines, points, terms, etc.): having similar or analogous positions or roles in distinct figures or functions. Also, of figures, expressions, etc.: showing one-to-one correspondence between elements; equivalent. M17.
a. Biology. Of organs, parts, or traits: orig., having the same fundamental structure, organization, or mode of development. Now esp. having a common evolutionary origin. M19.
E. C. Minkoff The human arm,..the bird's wing, and the pectoral fins of certain fishes are all homologous.
b. Medicine. Of a tumour: having the same form as normal tissue of the part. obsolete exc. Hist. L19.
c. Cytology. Of chromosomes: pairing at meiosis and (usu.) identical in morphology and in arrangement of genetic loci. E20.
d. Medicine & Zoology. Derived from or involving conspecific organisms; spec. involving or containing antibodies and their specific antigens. E20.
Chemistry. Of a series of (esp. organic) compounds: differing successively by addition of some constituent (esp. CH2), and showing graded physical and chemical properties. M19.