What is "rigor caloris"

Rigor \Ri"gor\, n. [L. See Rigor., below.]

1. Rigidity; stiffness.

2. (ed.) A sense of chilliness, with contraction of the skin; a convulsive shuddering or tremor, as in the chill preceding a fever.

   Rigor caloris[L., rigor of heat] (Physiol.), a form of rigor mortis induced by heat, as when the muscle of a mammal is heated to about 50[deg] C.

   Rigor mortis[L., rigor of death], death stiffening; the rigidity of the muscles that occurs at death and lasts till decomposition sets in. It is due to the formation of myosin by the coagulation of the contents of the individual muscle fibers.

n. (context biology English) A form of rigor mortis induced by heat, as when the muscle of a mammal is heated to about 50°C.