Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to cation: anion
An ion or group of ions having a positive charge and characteristically moving toward the negative electrode in electrolysis.
[Greek kation, something going down, from neuter present participle of katienai, to go down : kat-, kata-, cata- + ienai, to go; see ei- in Indo-European roots.]
cat′i·on′ic (kăt′ī-ŏn′ĭk) adj.
(General Physics) a positively charged ion; an ion that is attracted to the cathode during electrolysis. Compare anion
[C19: from cata- + ion]
cat•i•on(ˈkætˌaɪ ən, -ɒn)
1. a positively charged ion that is attracted to the cathode in electrolysis.
2. any positively charged ion (opposed to anion).
[1825–35; < Greek katión, neuter of katiṓn, present participle of kateînai to go down =kat- cat- + eînai to go]
cat`i•on′ic (-ˈɒn ɪk) adj.
An ion that has a positive charge. Hydrogen and ammonium ions are cations. Compare anion.
An ion that carries a positive charge, which is attracted by the negatively charged electrode, the cathode, during electrolysis.
Switch to new thesaurus
|Noun||1.||cation - a positively charged ion|
hydrogen ion - a positively charged atom of hydrogen; that is to say, a normal hydrogen atomic nucleus
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
diazonium - the univalent cation R-N:N- (where R is an aromatic hydrocarbon); found in salts that are used in manufacturing azo dyes