'Carapace' definitions:

Definition of 'carapace'

noun

Hard outer covering or case of certain organisms such as arthropods and turtles [syn: carapace, shell, cuticle, shield]

From: GCIDE

Carapace \Car"a*pace\ (k[a^]r"[.a]*p[=a]s), n. [F.] (Zool.) The thick shell or shield which covers the back of the tortoise, or turtle, the crab, and other crustaceous animals. [1913 Webster]