Noun | 1. | Casuaridae - a family of large ostrich-like birds including cassowaries bird family - a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings Casuariiformes, order Casuariiformes - a ratite bird order: cassowaries and emus Casuarius, genus Casuarius - type and sole genus of the Casuaridae: cassowaries |