ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  genus Cygnus - a genus of Anatidae bird genus - a genus of birds Anatidae, family Anatidae - swimming birds having heavy short-legged bodies and bills with a horny tip: swans; geese; ducks Cygnus olor, mute swan - soundless Eurasian swan; commonly domesticated Cygnus columbianus, tundra swan - swan that nests in tundra regions of the New and Old Worlds Cygnus buccinator, trumpeter swan, trumpeter - large pure white wild swan of western North America having a sonorous cry black swan, Cygnus atratus - large Australian swan having black plumage and a red bill |
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