rigor

Etymology

From Old French, from Latin rigor (“stiffness, rigidity, rigor, cold, harshness”), from rigere (“to be rigid”).

noun

  1. US spelling of rigour
  2. (medicine) A feeling of cold with shivering accompanied by a rise in body temperature.
  3. (physiology, informal) Short for rigor mortis.
    Heat always upped the rate at which rigor gripped a corpse. 2005, Jon Courtenay Grimwood, Pashazade, page 4, paragraph 3

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