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 (hə-mŏl′ə-jē, hō-)
n. pl. ho·mol·o·gies
1. The quality or condition of being homologous.
2. A homologous relationship or correspondence.
3. Chemistry
a. The relation of the elements of a periodic family or group.
b. The relation of the organic compounds forming a homologous series.
4. Mathematics A topological classification of configurations into distinct types that imposes an algebraic structure or hierarchy on families of geometric figures.

[Greek homologiā, agreement, from homologos, agreeing; see homologous.]


n, pl -gies
1. the condition of being homologous
2. (Chemistry) chem the similarities in chemical behaviour shown by members of a homologous series
3. (Zoology) zoology the measurable likenesses between animals, as used in grouping them according to the theory of cladistics
[C17: from Greek homologia agreement, from homologos agreeing; see homologate]


(həˈmɒl ə dʒi, hoʊ-)

n., pl. -gies.
1. the state of being homologous.
2. Biol.
a. a fundamental similarity based on common descent.
b. a structural similarity of two segments of one animal based on a common developmental origin.
3. the similarity of organic compounds of a series in which each member differs from successive compounds by a fixed increment, as by CH2.
4. a classification of mathematical figures according to certain topological properties.
[1650–60; < Greek homología agreement, derivative of homólog(os) homologous]


1. similarity of form or structure in two or more organisms owing to common descent.
2. similarity in form or structure between different parts of an organism owing to common origin. Cf. homodynamy.homologous, adj.
See also: Biology
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.homology - the quality of being similar or corresponding in position or value or structure or function
similarity - the quality of being similar
References in classic literature ?
What can be more singular than the relation between blue eyes and deafness in cats, and the tortoise-shell colour with the female sex; the feathered feet and skin between the outer toes in pigeons, and the presence of more or less down on the young birds when first hatched, with the future colour of their plumage; or, again, the relation between the hair and teeth in the naked Turkish dog, though here probably homology comes into play?
Wainwright analyst Debjit Chattopadhyay believes the selloff yesterday in shares of Homology Medicines provides a "compelling" entry point.
The priority will be to create homology models of the three integrins, based on the crystal structures of other members in the family, aVb3 and (the recently published) aVb6 structures.
A Morse-Bott Approach to Monopole Floer Homology and the Triangulation Conjecture
Tzianabos, the CEO and president of Homology Medicines, joins the board as Stoke is advancing toward the clinic with a pipeline of oligonucleotide therapies that aim to address the root cause of severe genetic diseases, starting with Dravet Syndrome.
Homology Medicines Inc (Nasdaq: FIXX), a genetic medicines company, announced yesterday its financial results for the quarter ended 30 June 2018.
Homology -- a similar trait shared by different species and derived from common ancestry, such as a seal's fin and a bird's wing -- is one of the most fundamental yet challenging concepts in evolutionary biology.
It's this homology to target being coded for by the crRNA that allows the host bacteria to use this as an adaptive immune system; by capturing short segments of viral sequence in the genetic element which codes for crRNAs, new target specificities (crRNAs) are developed without having to change the amino acid sequence of the CRISPR protein itself.
In this position paper, we present a brief overview of the ways topological tools, in particular persistent homology, has been applied to machine learning and data analysis problems.
Nucleotide sequence of the Pre-S2 region of the second sample MR03 does not show 100% homology with any of the reported sequences.
Persistent homology, which is first developed to explore the topological features of point cloud data, is a topological invariant, and it addresses the problem of choosing a reasonable threshold.
reported successful knock-in of reporter genes in human ESC/iPSC using short homology sequences (around 1 kb) at each side, through ZFNs in 2009 and TALEN in 2011 [14, 15], while Rong et al.