Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “cation”

cation

noun [C]     /ˈkæt.aɪən/ specialized
in chemistry, an ion (= type of atom) that has a positive electric charge and therefore moves towards the cathode (= negative part of electric cell) during electrolysisAtoms, molecules and sub-atomic particles
(Definition of cation noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of cation

Word of the Day

well in (with)

to have a good relationship with someone in which they like you and from which you get an advantage

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More