Submitted by György Chityil ... on Sat, 01/20/2018 - 01:10 Hierarchy: NounDescription: {{inorganic compound}} phosphorus sesquisulfideNgram: tetraphosphorus trisulfideNgram Text: tetraphosphorus trisulfideSource: WiktionaryIssue: 0Wiktionary tag: inorganic compoundNgram Count: 2