The Collaborative International Dictionary of English v.0.48:

Cheloniidae \Cheloniidae\ n.
   a natural family including the green turtles; hawksbills.

   Syn: family Cheloniidae, Chelonidae, family Chelonidae.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Cheloniidae
    n 1: green turtles; hawksbills [syn: Cheloniidae, family
         Cheloniidae, Chelonidae, family Chelonidae]