anion

[ an-ahy-uhn ]

/ ˈænˌaɪ ən /

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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).

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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

OTHER WORDS FROM anion

an·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. 2021

British Dictionary definitions for anion

anion

/ (ˈænˌaɪən) /

noun

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

Derived forms of anion

anionic (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

Medical definitions for anion

anion

[ ăn′ī′ən ]

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

Other words from anion

an′i•on′ic (-ŏn′ĭk) adj.

Scientific 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.