The Collaborative International Dictionary of English v.0.48:

Pavo \Pa"vo\, prop. n. [L., a peacock. See Peacock.]
   1. (Zool.) A genus of birds, including the peacocks.
      [1913 Webster]

   2. (Astron.) The Peacock, a constellation of the southern
      hemisphere.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Pavo
    n 1: a small constellation near the South Pole between Tucana
         and Ara
    2: peafowl [syn: Pavo, genus Pavo]