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. 2019

British Dictionary definitions for anionic

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 anionic

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).

anionic in Medicine