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cations - 3 dictionary results

cat⋅i⋅on

[kat-ahy-uhn, -on]
–noun Physical 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 ).
Also, kation.


Origin:
1825–35; < Gk katión going down (neut. of katin, prp. of kateînai), equiv. to kat- cat- + -i- go + -on neut. prp. suffix


cat⋅i⋅on⋅ic [kat-ahy-on-ik] , adjective
cat⋅i⋅on⋅i⋅cal⋅ly, adverb
cat·i·on   (kāt'ī'ən)   
n.  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 (kāt'ī-ŏn'ĭk) adj.
cation   (kāt'ī'ən)  Pronunciation Key 
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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