anion

an·i·on  (nn)

n.

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

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[From Greek, neuter present participle of anienai, to go up : ana-, ana- + ienai, to go; see ei- in Indo-European roots.]

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ani·onic (-nk) adj.

ani·oni·cal·ly adv.

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anion [an-eye-on]

Noun

an ion with negative charge [Greek ana- up + ienai to go]

anionic adj

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anion  (nn)

An ion with net negative charge, having more electrons than protons. In electrolysis, anions migrate to a positively charged anode. Compare cation.

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-"