Submitted by György Chityil ... on Sat, 01/20/2018 - 01:01 Hierarchy: NounDescription: {{biology|genetics}} A mutation (and associated gene) affecting the trunk mesoderm in some fish embryosNgram: spadetailNgram Text: spadetailSource: WiktionaryIssue: 0Wiktionary tag: biologygeneticsNgram Count: 1