Morpheme
-onium
Type
suffix
Denotation
chemical (denoting quaternary ammonium compounds), physical (denoting an onium particle), and technical suffix
Etymology
modern coinage from Latin -onium; Ancient Greek -onion
Evidence
Acousmonium, argonium, bottomonium, carbonium, cefalonium, charmonium, decamethonium, fluxonium, gluonium, helionium, hydronium, oxonium, quarkonium, quarkonium, strangeonium
