Rickets. A disease of the bones.

Rigor. A slight tremor and chilliness.

Rigor Mortis. Stiffening of the body after death.

Rubefacient. Making red and warm.

Rupture. A protrusion of any of the contents of the belly through the parietes.

Saccharum. Sugar.

Sacrum. The os sacrum or os basilaire.

Sagittal. The name of a suture that unites the parietal bones.

Salt. A compound of an acid and a base combined chemically.

Sanative. Curative; sanitary.