Submitted by György Chityil ... on Sat, 01/20/2018 - 01:10 Hierarchy: NounDescription: {{organic compound}} The unsaturated three-membered heterocycle containing two carbon atoms, one sulfur atom and a double bond.Ngram: thiireneNgram Text: thiireneSource: WiktionaryIssue: 0Wiktionary tag: organic compoundNgram Count: 1