Wiktionary
n. A severe burn that destroys skin and underlying tissue and exposes nerve endings.
WordNet
n. burn characterized by destruction of both epidermis and dermis
Usage examples of "third-degree burn".
My son Tom came home last night with a third-degree burn on his shoulder.
I decided there was no way to drink it except quickly, and the third-degree burn I received on the back of my throat was soon replaced by a pleasant glow.
But it still hurt like a third-degree burn over every square centimeter of naked flesh, eyeballs fried in their sockets, one dying inhalation of molten lead, enema of same: complete feedback overload.
I knew from my own third-degree burn, which had been roughly the same size, but which I'd received from a motorcycle exhaust pipe when I'd been around his own age.
He was holding her hand, stroking it as gently as a man removing ashes from a third-degree burn.