rabies
see hydrophobia

ranunculus bulbosus
Perennial Old World buttercup with yellow flowers in late spring to
early summer.

red precipitate
Mercuric oxide (HgO) a heavy red crystalline powder formed by heating
mercuric nitrate, or by heating mercury in the air.

repousse
Ornamented with patterns in relief made by pressing or hammering on the
reverse side;

resorcinol (resorcin)
White crystalline compound, C6H4(OH)2, used to treat certain skin
diseases and in dyes, resin adhesives, and pharmaceuticals.

Rhamnus Purshiana (Cascara buckthorn )
Buckthorn of the Pacific coast of the United States, which yields
cascara sagrada.

rhatany
Dried root of South American shrubs (Krameria lappacea or K. argentea)
used as an astringent and in toothpaste and mouthwash.

rheumatic fever
Acute inflammatory disease occurring after an infection from group A