cȳcnus m (屬格 cȳcnī)；第二类变格
- 天鵝
- cycnus in Charlton T. Lewis & Charles Short, A Latin Dictionary, Oxford: Clarendon Press, 1879
- “cycnus”, in Charlton T. Lewis (1891年) An Elementary Latin Dictionary，New York：Harper & Brothers
- cycnus在Charles du Fresne du Cange的Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
- cycnus在Gaffiot, Félix (1934年) Dictionnaire illustré Latin-Français (拉丁語-法語詳解詞典)，Hachette中的內容
- “cycnus”, in Harry Thurston Peck, editor (1898年) Harper's Dictionary of Classical Antiquities，New York：Harper & Brothers
- “cycnus”, in William Smith, editor (1848年) A Dictionary of Greek Biography and Mythology，London：John Murray
