Gaviiformes

from WordNet (r) 3.0 (2006)

Gaviiformes
    n 1: large aquatic birds: loons and some extinct forms [syn:
         {Gaviiformes}, {order Gaviiformes}]

from The Collaborative International Dictionary of English v.0.48

Gaviiformes \Gaviiformes\ prop. n.
   An order of large aquatic birds, including loons and some
   extinct forms.

   Syn: order {Gaviiformes}.
        [WordNet 1.5]