(Alternate spelling: rigour)
1. Rigidity; stiffness.
2. A sense of chilliness, with contraction of the skin; a convulsive shuddering or tremor, as in the chill preceeding a fever.
Shiver; chill; rigidity; abbreviation of rigor mortis.
Medical term for shivering or rigidity. Rigor mortis is the stiffness that ensues in a corpse soon after death, owing to chemical changes in muscle tissue.