anion
Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to anion: anion exchange, anion gap
an·i·on
(ăn′ī′ən)n.
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.
an′i·on′i·cal·ly adv.
anion
(ˈænˌaɪən)n
(Chemistry) a negatively charged ion; an ion that is attracted to the anode during electrolysis. Compare cation
[C19: from ana- + ion]
anionic adj
an•i•on
(ˈænˌaɪ ən)n.
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`i•on′i•cal•ly, adv.
an·i·on
(ăn′ī′ən) An ion that has a negative charge. Hydroxide and chloride ions are anions. Compare cation.
anion
An ion that carries a negative charge, especially one migrating to an anode during electrolysis.
ThesaurusAntonymsRelated WordsSynonymsLegend:
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 hydroxide ion, hydroxyl ion - the anion OH having one oxygen and one hydrogen atom superoxide anion, superoxide - the univalent anion O2-; "much of the O2 supporting cellular respiration is reduced to the superoxide anion O2-" |