What does the word cassowary mean?

The cassowary is a large flightless bird native to New Guinea, northern Australia and islands in between. It is a member of the ratite family, which includes the ostrich, emu, rhea and kiwi. Ratites have wings but the bones in their chests do not have the capacity for flight muscles, which is what a bird needs to fly. The cassowary is the second-heaviest of the ratites, and its wings are also too small by comparison to lift it.