The Collaborative International Dictionary of English v.0.48:

Peafowl \Pea"fowl`\, n. [See Peacock.] (Zool.)
   The peacock or peahen; any species of Pavo.
   [1913 Webster]

WordNet (r) 3.0 (2006):

peafowl
    n 1: very large terrestrial southeast Asian pheasant often
         raised as an ornamental bird [syn: peafowl, bird of
         Juno]