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Etymology 1[edit]

From Latin corium (leather).


corium (plural 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.
    (Can we find and add a quotation of Fosbroke to this entry?)

Etymology 2[edit]

core +‎ -ium


corium (uncountable)

  1. (nuclear physics) The lavalike material produced in a nuclear meltdown.
    • 1991, Franklin Chung and L.E. Hochreiter, 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 *ker-, *sker-. Cognate with Latin cortex, cārō, culter, Ancient Greek κείρω (keírō, I cut off), Dutch scheren, German scheren, Norwegian skjære, Swedish skära; and (from Indo-European), Albanian harr (to cut, to mow), Lithuanian skìrti (separate), Welsh ysgar (separate), Old Armenian քերեմ (kʿerem, to scrape, scratch). See also Latin secō, scindō, sciō, caedō, carpō, curtus, scalpō, sculpō, glubō, Ancient Greek γλύφω (glúphō), γράφω (gráphō), English grave.



corium n (genitive coriī); second declension

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


Second declension neuter.

Number Singular Plural
nominative corium coria
genitive coriī coriōrum
dative coriō coriīs
accusative corium coria
ablative coriō coriīs
vocative corium coria

Derived terms[edit]