1. 
   zwitterions
   A molecule carrying a positive charge at one end and a negative charge at the other. Also known as ampholyte or dipolar ions.
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
2. 
   zwitterions
   Synonym: dipolar ions. ... See: zwitter hypothesis. ... Origin: Ger. Zwitter, hermaphrodite, mongrel + ion ... (05 Mar 2000) ...
   Found op http://www.mondofacto.com/facts/dictionary?zwitterions
   
   

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