definitions

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 detergent, aniridia

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 forms

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. 2019

Examples from the Web for anion

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

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

Medicine definitions for anion

anion

[ ăn′ī′ən ]

n.

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

Related forms

an′i•on′ic (-ŏn′ĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.