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RADIOLOGIST: X-rayted cameraman.

RAFFINOSE is a trisaccharide found in cottonseed and other plants. Raffinose when broken down into individual sugar molecules will give glucose, galactose, and fructose.

REFRIGERANT - an agent which alleviates heat, fever, or thirst.

RESINS are amorphous substances consisting of the hardened secretions of plants; these secretions may be volatile oils. Resin is also a term used to indicate organic substances soluble in ether but not in water.

RHAMNETIN (7-methylquercetin) is a flavonoid found in belladonna and cloves.

RHAMNOSE is a sugar found in alfalfa, comfrey, pectin, and senna.

RHEIN is an anthraquinone found in senna and the rhubarb plant. It has laxative properties.

RNA (Ribonucleic acid) is a nucleic acid found principally in the nucleolus, microsomes, and mitochondria of cells. RNA reacts with and carries an activated amino acid to participate in the manufacture of protein molecules. It takes the place of DNA in certain viruses; it differs from DNA in that its sugar is ribose and the pyrimidine uracil is present rather than thymine. The three major forms of RNA are transfer RNA (tRNA), messenger RNA (mRNA), and ribosomal RNA (rRNA).

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