| Noun | 1. | family Dugongidae - a family of mammals of order Sirenia including dugongs and Steller's sea cow mammal family - a family of mammals order Sirenia, Sirenia - an animal order including: manatees; dugongs; Steller's sea cow genus Dugong - type genus of the Dugongidae comprising only the dugongs genus Hydrodamalis, Hydrodamalis - a genus of the family Dugongidae comprising only Steller's sea cow |