• synonyms


[tsvit-er-ahy-uh n]
noun Physical Chemistry.
  1. an ion with both a positive and a negative charge.
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Origin of zwitterion

< German Zwitterion (1897), equivalent to Zwitter hybrid, hermaphrodite + Ion ion
Related formszwit·ter·i·on·ic [tsvit-er-ahy-on-ik] /ˌtsvɪt ər aɪˈɒn ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for zwitterion


  1. chem an ion that carries both a positive and a negative charge
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Derived Formszwitterionic (ˌtsvɪtəraɪˈɒnɪk), adjective

Word Origin for zwitterion

C20: from German Zwitter hermaphrodite + ion
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

zwitterion in Medicine


(zwĭtər-ī′ən, swĭt-, tsvĭt-)
  1. dipolar ion
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Related formszwit′ter•i•onic (-ī-ŏnĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.