The Collaborative International Dictionary of English v.0.48:
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. [1913 Webster]WordNet (r) 3.0 (2006):
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: Cygnus, genus Cygnus]