Carapace. Noun. Hard outer coating of certain organisms such as arthropods and turtles. syn: shell, cuticle, shield.
While we are on the subject of hard outer coatings, (apropo previous post, Crustaceans), by changing one simple vowel for another in the middle of the word carapace, turns it into my very own version: caropace.
Caropace. Noun. Tough outer coating of a certain Homo sapiens, more commonly known by the name, Caro. syn: a virtual outer shell invisible to the naked eye designed to protect the soft, sensitive and vulnerable interior spaces of this particular being.