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Definition of Cygnine
1. Adjective. (zoology) Being of the genus ''Cygnus'' (swan), within subfamily ''Anserinae'' of the family ''Anatidae'', though sometimes considered a distinct subfamily, ''Cygninae''. ¹
2. Adjective. Of, concerning, pertaining to, resembling, or having the characteristics of a swan or swans. ¹
3. Noun. (dated) An alkaloid from ''gastrolobium calycinium'', the 'York Road' poison plant; a convulsant poison, C19H22N2O3. ¹
¹ Source: wiktionary.com