1. (龟、蟹等的)甲壳,背甲
A carapace is the protective shell on the back of some animals such as tortoises or crabs.

2. (用以自我保护的)外壳，外衣,外表
You can refer to an attitude that someone has in order to protect themselves as their carapace .

1. hard outer covering or case of certain organisms such as arthropods and turtles

Synonym: shellcuticleshield