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Etymology 1[edit]

From Latin corium (leather).


corium (plural coriums or coria)

  1. (anatomy) The inner layer of skin, the dermis.
  2. (anatomy) The deep layer of mucous membranes beneath the epithelium.
  3. (historical) Armour made of leather, particularly that used by the Romans.
    • 1825, Thomas Dudley Fosbroke, Encyclopaedia of antiquities, and elements of archaeology, classical and mediæval:
      Passing by the Corium Bubulum of the Classical Ancients, we see in an old charter, dated 1036, "Stallus Sutoris Vaccæ," i. e. the stall of a shoe-maker who used cow-skin.

Etymology 2[edit]

core +‎ -ium


corium (uncountable)

  1. (nuclear physics) A lavalike mixture of fissile material created in a nuclear reactor's core during a nuclear meltdown.
    • Franklin Chung and L.E. Hochreiter (1991) Numerical modelling of basic heat transfer phenomena in nuclear systems, page 32: “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.”
    • 2009, Wei Wei and Xin-rong Cao, "The Simulation of Corium Dispersion in Direct Containment Heating Accidents", Zero Carbon Energy Kyoto 2009.
    • 2011, C. Journeau and M. Ficsher, Nuclear Safety in Light Water Reactors: Severe Accident Phenomenology, page 569:
      As a result, dedicated core catchers have been designed that can gather the corium and cool it safely.



From Proto-Indo-European *(s)ker-.



corium n (genitive coriī or corī); second declension

  1. skin; hide, leather
  2. leather belt, whip
  3. crust, coat, peel, shell
  4. upper layer


Second-declension noun (neuter).

Case Singular Plural
Nominative corium coria
Genitive coriī
Dative coriō coriīs
Accusative corium coria
Ablative coriō coriīs
Vocative corium coria

1Found in older Latin (until the Augustan Age).

Derived terms[edit]


  • Albanian: kue
  • Asturian: cueru
  • Bourguignon: cueu
  • Catalan: cuir
  • English: corium
  • Galician: coiro
  • Italian: cuoio
  • Old French: cuir
  • Portuguese: couro, coiro
  • Spanish: cuero