An outer protective covering such as the feathers or skin of an animal or rind or shell
an outer protective covering such as the skin of an animal or a cuticle or seed coat or rind or shell
something such as a shell which covers something else (integumentum, from tegere ). Covering of the body, which protects it from the outside world and from drying out. In humans and other mammals it consists of the skin (including outer epidermis and inner dermis) and its related structures, including hair, nails, and sebaceous and sweat glands