Definition of dimer in English:


Pronunciation /ˈdīmər/ /ˈdaɪmər/


  • A molecule or molecular complex consisting of two identical molecules linked together.

    ‘Furthermore, there was no evidence of ethyl esters, dimers, alkanes or alkenes, which might be expected for an oxidative reaction.’
    • ‘One explanation is the metal ions bind inside the dimer between the monomers of a double-helix.’
    • ‘Molecular dimers are assumed to be not directly degraded.’
    • ‘In this paper, we synthesized a covalent dimer of alamethicin that was N-terminally linked by a disulfide bond.’
    • ‘The resulting dimer forms an ion channel in lipid membranes that is selective for monovalent cations only.’


1930s from di-‘two’, on the pattern of polymer.