corium

noun4

1. •
   A lavalike mixture of fissile material created in a nuclear reactor's core during a nuclear meltdown.

   • Previous studies of the thermal behavior of corium in a degraded nuclear reactor have focussed primarily on the process of heat transfer within the corium. — 1991
2. •
   The layer of skin between the epidermis and the subcutaneous tissues.
3. •
   The deep layer of mucous membranes beneath the epithelium.
4. •
   (historical) Armour made of leather, particularly that used by the Romans.

   • Passing by the Corium Bubulum of the Classical Ancients, we see in an old charter, dated 1036, "Stallus Sutoris Vaccae," i. e. the stall of a shoe-maker who used cow-skin. — 1825