-onium

== English == === Etymology 1 === From onium or -on +‎ -ium. ==== Suffix ==== -onium (particle physics) Designating an onium particle. ===== Derived terms ===== === Etymology 2 === From onium. ==== Suffix ==== -onium (chemistry) Used to form the name of polyatomic cations. Common examples are quaternary ammonium compounds used as neuromuscular blocking agents, cholinergic agents, anticholinergic agents, antibacterials/antiseptics, or other agents. Alternative form: -ium ===== Derived terms ===== ==== References ==== IUPAC Gold Book: onium compounds == French == === Pronunciation === IPA(key): /ɔ.njɔm/ === Suffix === -onium -onium ==== Derived terms ====