In a manner relating to cations, or positively charged ions; using cationic processes or cationic materials.
From 'cation' (positively charged ion, from Greek 'kation' meaning going down) plus '-ic' (adjective suffix) plus '-ally' (adverb suffix). Chemistry terminology from the 20th century.
The words 'cation' and 'anion' are opposites that confuse everyone—cations are positive ions that were named 'kation' (going down) because they move toward the cathode in early experiments, even though 'cathode' means negative.
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