Chemical
cation

cat·i·on [ kat-ahy-uhn, -on ]
Definitions related to cations:
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A positively charged ion; cations in the body include sodium, potassium, and magnesium.Harvard Dictionary of Health TermsHarvard Medical Publishing, 2011
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Positively charged atoms, radicals or groups of atoms which travel to the cathode or negative pole during electrolysis.CRISP ThesaurusNational Institutes of Health, 2006
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