Main Entry: ho·mol·o·gy

Pronunciation: \hō-ˈmäl-ə-jē, hə-\

Function: noun

Inflected Form(s): plural ho·mol·o·gies

1 a : 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, homomorphy b : correspondence in structure between different parts of the same individual
2 a : 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 CH₂ b : the relation existing among elements in the same group of the periodic table c : similarity of nucleotide or amino acid sequence (as in nucleic acids or proteins)