出典:Wiktionary
出典:『Wiktionary』 (2025/08/09 23:47 UTC 版)
onium (plural oniums)
onium (plural onia)
出典:Wikipedia
出典:『Wikipedia』 (2011/05/23 14:15 UTC 版)
An onium (plural: onia) is the bound state of a particle and its antiparticle. They are usually named by adding the suffix -onium to the name of the constituting particle. However, despite its name, Muonium is not a muon–antimuon onium because IUPAC assigned the name to the system of an antimuon bound with an electron. (Muon–antimuon onium would be named muononium.)