Submitted by György Chityil ... on Fri, 01/19/2018 - 20:53 Hierarchy: NounDescription: {{organic chemistry|especially in combination}} Any of four isomeric divalent radicals derived from a buteneNgram: butenylideneNgram Text: butenylideneSource: WiktionaryIssue: 0Wiktionary tag: organic chemistryespecially in combinationNgram Count: 1
