Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to anion: anion exchange, anion gap
A negatively charged ion, especially the ion that migrates to an anode in electrolysis.
[From Greek, neuter present participle of anienai, to go up : ana-, ana- + ienai, to go; see ei- in Indo-European roots.]
an′i·on′ic (-ŏn′ĭk) adj.
(Chemistry) a negatively charged ion; an ion that is attracted to the anode during electrolysis. Compare cation
[C19: from ana- + ion]
1. a negatively charged ion that is attracted to the anode in electrolysis.
2. any negatively charged ion (opposed to cation).
[1825–35; < Greek, neuter of aniṓn, present participle of aniénai to go up]
an`i•on′ic (-ˈɒn ɪk) adj.
An ion that has a negative charge. Hydroxide and chloride ions are anions. Compare cation.
An ion that carries a negative charge, especially one migrating to an anode during electrolysis.
Switch to new thesaurus
|Noun||1.||anion - a negatively charged ion|
ion - a particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons