The Collaborative International Dictionary of English v.0.48:

Caprimulgus \Caprimulgus\ n.
   the type genus of the Caprimulgidae, including the
   whip-poor-will (Caprimulgus vociferus) and the
   chuck-will's-widow (Caprimulgus carolinensis).

   Syn: genus Caprimulgus.
        [WordNet 1.5 +PJC]

WordNet (r) 3.0 (2006):

Caprimulgus
    n 1: type genus of the Caprimulgidae [syn: Caprimulgus, genus
         Caprimulgus]