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 the Appendix of Indo-European roots.] cat′i·onic (kăt′ī-ŏnĭk) adj. |
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