anion

[an-ahy-uh n]

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).

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. 2018

Examples from the Web for anion

Historical Examples of anion

One of these is always composed of oxygen and hydrogen and is the anion.
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
The king repaired in state to the temple of Anion, seized the priests who professed these seditious beliefs, and burnt them alive.
History Of Egypt, Chalda, Syria, Babylonia, and Assyria, Volume 9 (of 12)
G. Maspero
The Nile beyond surrounded an island, where flourished the well-kept sacred grove of Anion.
Uarda, Complete
Georg Ebers
In a few minutes the priest of Anion and the chief of the kolchytes were being carried towards the valley in their litters.
Uarda, Complete
Georg Ebers

British Dictionary definitions for anion

anion

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

"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).

anion in Medicine

anion

[ăn′ī′ən]

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

Related formsan′i•on′ic (-ŏn′ĭk) adj.

anion in Science

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.