Renal.—Pertaining to the kidneys.
Retroversion.—Falling backward.
Retroverted.—Bent backward.
Rigor.—Chilliness. Convulsive shuddering.
Sacral.—Pertaining to the sacrum, the large, triangular bone near the end of the spinal column.
Saline.—Salty.
Salivation.—Unnatural flow of saliva.
Sanative.—Health producing.
Sanguineous.—Bloody.
Sanguinaria.—Blood root.