Submitted by György Chityil ... on Fri, 01/19/2018 - 23:54 Hierarchy: NounDescription: {{physics|chemistry}} an exotic atom equivalent to a hydrogen atom with the proton replaced by a pionNgram: pioniumNgram Text: pioniumSource: WiktionaryIssue: 0Wiktionary tag: physicschemistryNgram Count: 1
