The Collaborative International Dictionary of English v.0.48:

Accipitridae \Accipitridae\ n.
   1. 1 a family of birds consisting of the hawks; -- this
      family includes the Old World vultures; kites; harriers;
      and eagles.

   Syn: family Accipitridae.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Accipitridae
    n 1: hawks; Old World vultures; kites; harriers; eagles [syn:
         Accipitridae, family Accipitridae]