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anion

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Anion
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an⋅i⋅on

  [an-ahy-uhn]
Use anion in a Sentence
–noun Physical Chemistry.
1. a negatively charged ion, as one attracted to the anode in electrolysis.
2. any negatively charged atom or group of atoms (opposed to cation ).
Origin:
1825–35; < Gk, neut. of anin going up (prp. of aniénai to go up), equiv. to an- an- 3 + -i- go + -ōn prp. suffix

Related forms:
an⋅i⋅on⋅ic  [an-ahy-on-ik] , adjective
an⋅i⋅on⋅i⋅cal⋅ly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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an·i·on   (ān'ī'ən)   
n.  A negatively charged ion, especially the ion that migrates to an anode in electrolysis.

[From Greek, neuter present participle of anienai, to go up : ana-, ana- + ienai, to go; see ei- in Indo-European roots.]
an'i·on'ic (-ŏn'ĭk) adj., an'i·on'i·cal·ly adv.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

anion 
"a negatively charged ion, which moves toward the anode (q.v.) during electrolysis," 1834, proposed by Whewell and published by Eng. physicist Michael Faraday from Gk. anion "(thing) going up," neut. pp. of anienai "go up," from ana "up" + ienai "go" (see ion).
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: an·ion
Pronunciation: 'an-"I-&n
Function: noun
: the ion in an electrolyzed solution that migrates to the anode; broadly : a negatively charged ion
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

anion an·i·on (ān'ī'ən)
n.
A negatively charged ion, especially one that migrates to the anode in electrolysis.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
anion   (ān'ī'ən)  Pronunciation Key 
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 © 2002. Published by Houghton Mifflin. All rights reserved.
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