anion

[ an-ahy-uh n ]

/ ˈænˌaɪ ən /

noun Physical Chemistry.

a negatively charged ion, as one attracted to the anode in electrolysis.

any negatively charged atom or group of atoms (opposed to cation).

Nearby words

animis opibusque parati, animism, animosity, animus, animé, anion, anion exchange, anion gap, anion-exchange resin, anionic, anionic detergent

Origin of anion

1825–35; < Greek, neuter of aniṓn going up (present participle of aniénai to go up), equivalent to an- an-³ + -i- go + -ōn present participle suffix

Related formsan·i·on·ic

[an-ahy-on-ik] /ˌæn aɪˈɒn ɪk/, adjectivean·i·on·i·cal·ly, adverb

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for anion

One of these is always composed of oxygen and hydrogen and is the anion.
An Elementary Study of Chemistry|William McPherson
The Nile beyond surrounded an island, where flourished the well-kept sacred grove of Anion.
Uarda, Complete|Georg Ebers
It will be noticed that in neutralization the anion of the acid and the cation of the base are not changed.
An Elementary Study of Chemistry|William McPherson
Now, one question: Has the news of the death of the ram of Anion reached you?
Uarda, Complete|Georg Ebers

In this the heart shall be preserved till a new ram offered by a worthy hand enters the herd of Anion.
Uarda, Complete|Georg Ebers

British Dictionary definitions for anion

anion

/ (ˈænˌaɪən) /

noun

a negatively charged ion; an ion that is attracted to the anode during electrolysisCompare cation

Derived Formsanionic (ˌænaɪˈɒnɪk), adjective

Word Origin for anion

C19: from ana- + 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

Word Origin and History for anion

anion

"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).

Medicine definitions for anion

anion

[ ăn′ī′ən ]

n.

A negatively charged ion, especially one that migrates to the anode in electrolysis.

Related formsan′i•on′ic (-ŏn′ĭk) adj.

Science definitions for anion

anion

[ ăn′ī′ən ]

An ion with net negative charge, having more electrons than protons. In electrolysis, anions migrate to a positively charged anode. Compare cation.