Meaning of zwitterion in English:


Pronunciation /ˈzwɪtərʌɪən/ /ˈtsvɪtərʌɪən/


  • A molecule or ion having separate positively and negatively charged groups.

    • ‘Further experiments will address the problem of how many water molecules are required to facilitate and stabilise charge transfer to the zwitterion.’
    • ‘In these studies we have immobilized a wide range of hydrophobic zwitterions onto a reversed-phase chromatographic support to produce the desired zwitterionic stationary phase.’
    • ‘As a result, gramicidin does not form a zwitterion or become charged at any pH, explaining its poor solubility in water.’
    • ‘Some organic molecules may carry a positive and a negative charge on different parts of the molecule and are known as zwitterions.’
    • ‘In the case of SPM, the presence of the highly hydratable and relatively bulky zwitterion, phosphorylcholine, further affects ceramide behavior.’


Early 20th century from German, from Zwitter ‘a hybrid’ + Ion ‘ion’.



/ˈzwɪtərʌɪən/ /ˈtsvɪtərʌɪən/