ION
none. Atom or group of atoms that has lost one or more electrons (= *cation), or gained one or more electrons (= *anion). [greek, = going] -ion suffix (usually. As -sion, -tion, -xion) forming nouns denoting: 1 verbal action (excision). 2 instance of this (a suggestion). 3 resulting state or product (vexation; concoction). [latin -io]