Search and compare thousands of words and phrases in British Sign Language (BSL). The largest collection online.
How to sign: the outer layer of the skin covering the exterior body surface of vertebrates
Similiar / Same: epidermis
Categories: stratum
Within this category: mantle
How to sign: hard outer covering or case of certain organisms such as arthropods and turtles
Similiar / Same: carapace, shell
Categories: exoskeleton
Within this category: cuticula