homologous

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ho·mol·o·gous / hōˈmäləgəs; hə-/ • adj. having the same relation, relative position, or structure, in particular: ∎  Biol. (of organs) similar in position, structure, and evolutionary origin but not necessarily in function: a seal's flipper is homologous with the human arm. Often contrasted with analogous. ∎  Biol. (of chromosomes) pairing at meiosis and having the same structural features and pattern of genes. ∎  Chem. (of a series of chemical compounds) having the same functional group but differing in composition by a fixed group of atoms.

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