The Collaborative International Dictionary of English v.0.48:

Anhimidae \Anhimidae\ n.
   a family of aquatic birds of South America. They are called
   screamers due to their harsh trumpeting call.

   Syn: family Anhimidae.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Anhimidae
    n 1: screamers [syn: Anhimidae, family Anhimidae]