rickets. Disease of early childhood characterized by defective nutrition of the bony structures.

Roentgen rays. (See X-ray.)

rotated. Turned about or around on its own axis.

S

sac. Pouch; bursa.

saccharomyces. The yeast fungi.

salicylate of mercury. A salt of mercury and salicylic acid.

salvarsan. The Ehrlich-Hata anti-syphilitic preparation; known also as No. 606.

saphenous vein. The ascending vein of the lower limb which empties into the femoral vein.

saprophyte. A microorganism which normally grows on dead matter.