Definition of zwitterion in English:

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Pronunciation: /ˈzwɪtərʌɪən/
Pronunciation: /ˈtsvɪtərʌɪən/


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



Example sentences
  • It is this combination of experiment and theory that provides a new and detailed picture of the specific interaction between sodium ions and zwitterionic lipid molecules.
  • Another significant factor may be the difference in charge between the buffer salts; phosphate is anionic whereas Tris is cationic and zwitterionic.
  • The main goal of the present article is to evaluate atomistic molecular dynamics simulations as tools for investigating monolayers of zwitterionic and anionic phospholipids.


Early 20th century: from German, from Zwitter 'a hybrid' + Ion 'ion'.

For editors and proofreaders

Line breaks: zwit¦ter|ion

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