cation

or kat·i·on

[ kat-ahy-uhn, -on ]

nounPhysical Chemistry.
  1. a positively charged ion that is attracted to the cathode in electrolysis.

  2. any positively charged atom or group of atoms (opposed to anion).

Origin of cation

1
1825–35; <Greek katión going down (neuter of katiṓn, present participle of kateînai ), equivalent to kat- cat- + -i- go + -on neuter present participle suffix

Other words from cation

  • cat·i·on·ic [kat-ahy-on-ik], /ˌkæt aɪˈɒn ɪk/, adjective
  • cat·i·on·i·cal·ly, adverb

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

British Dictionary definitions for cation

cation

/ (ˈkætaɪən) /


noun
  1. a positively charged ion; an ion that is attracted to the cathode during electrolysis: Compare anion

Origin of cation

1
C19: from cata- + ion

Derived forms of cation

  • cationic (ˌkætaɪˈɒnɪk), adjective

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

Scientific definitions for cation

cation

[ kătī′ən ]


  1. An ion with net positive charge, having more protons than electrons. In electrolysis, cations migrate to a negatively charged cathode. Compare anion.

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