Word Origin See more synonyms on Thesaurus.com a negatively charged ion, as one attracted to the anode in electrolysis. any negatively charged atom or group of atoms (opposed to cation). Origin of anion 1825–35;
going up (present participle of
to go up), equivalent to
an- an- 3
present participle suffix
Related forms an·i·on·ic , [an-ahy- on-ik] /ˌæn aɪˈɒn ɪk/ adjective an·i·on·i·cal·ly, adverb
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for anionic a negatively charged ion; an ion that is attracted to the anode during electrolysis Compare cation Derived Forms anionic ( ˌænaɪˈɒnɪk), adjective Word Origin
ana- + ion
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for anionic anion n.
"a negatively charged ion, which moves toward the
anode (q.v.) during electrolysis," 1834, proposed by the Rev. William Whewell (1794-1866), English polymath, and published by English physicist Michael Faraday, from Greek anion "(thing) going up," neuter past participle of anienai "go up," from ana "up" (see ana-) + ienai "go" (see ion).
Online Etymology Dictionary, © 2010 Douglas Harper
anion (ăn ′ī′ən) A negatively charged ion, especially one that migrates to the anode in electrolysis. Related forms an ( ′i•on ′ic -ŏn) ′ĭk adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
An ion with net negative charge, having more electrons than protons. In electrolysis, anions migrate to a positively charged anode. Compare cation.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.