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Medical Dictionary

homology

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noun ho·mol·o·gy \hō-ˈmäl-ə-jē, hə-\

Medical Definition of homology

plural homologies

  1. 1a:  likeness in structure between parts of different organisms due to evolutionary differentiation from the same or a corresponding part of a remote ancestor—compare analogy, homomorphyb:  correspondence in structure between different parts of the same individual

  2. 2a:  the relation existing between chemical compounds in a series whose successive members have in composition a regular difference especially of one carbon and two hydrogen atoms CH2b:  the relation existing among elements in the same group of the periodic tablec:  similarity of nucleotide or amino acid sequence (as in nucleic acids or proteins)




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