 Definitions of homology [əˈmɒl ə dʒi, hoʊ-] 
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1. (n.) homology
the state of being homologous.
2. homology
Biol.
3. homology
a fundamental similarity based on common descent.
4. homology
a structural similarity of two segments of one animal based on a common developmental origin.
5. homology
the similarity of organic compounds of a series in which each member differs from successive compounds by a fixed increment, as by CH
6. homology
a classification of mathematical figures according to certain topological properties.
Etymology: (1650–60; < Gk homología agreement, der. of homólog(os)homologous)
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| Definition of 'homology' |
Princeton's WordNet |
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1. (noun) homology
the quality of being similar or corresponding in position or value or structure or function
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| Definition of 'homology' |
Webster Dictionary |
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1. (noun) homology
the quality of being homologous; correspondence; relation; as, the homologyof similar polygons
2. (noun) homology
correspondence or relation in type of structure in contradistinction to similarity of function; as, the relation in structure between the leg and arm of a man; or that between the arm of a man, the fore leg of a horse, the wing of a bird, and the fin of a fish, all these organs being modifications of one type of structure
3. (noun) homology
the correspondence or resemblance of substances belonging to the same type or series; a similarity of composition varying by a small, regular difference, and usually attended by a regular variation in physical properties; as, there is an homology between methane, CH4, ethane, C2H6, propane, C3H8, etc., all members of the paraffin series. In an extended sense, the term is applied to the relation between chemical elements of the same group; as, chlorine, bromine, and iodine are said to be in homology with each other. Cf. Heterology
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