天鵝屬;天鵝座
Cygnus \Cyg"nus\ (s?g"n?s), n. [L., a swan.] (Astron.) A constellation of the northern hemisphere east of, or following, Lyra; the Swan.
Cygnus n 1: a constellation in the northern hemisphere between Pegasus and Draco in the Milky Way; contains a black hole 2: a genus of Anatidae [syn: {genus Cygnus}]