Regimen—Regulated habits and food.
Retching—An effort to vomit.
Retina—Inner coat of the eye.
Retroversion—Falling backward.
Rigor—Chilliness, convulsive shuddering.
Sacrum—Bone of the pelvis.
Saliva—Fluid of the mouth.
Salivation—Unnatural flow of saliva.
Sanative—Health-producing.
Sciatic—Pertaining to the hip.