Definitions for "Carapace"
The thick shell or shield which covers the back of the tortoise, or turtle, the crab, and other crustaceous animals.
unsegmented, anterior covering of the crustacean body composed largely of lime and sclerotin (calcified spicules or fibers)
the hard or bony shell that covers the back of an animal, like a turtle or crab.
Encyclopaedia Britannica 2002