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Drugs and diseases reference index

Drugs and diseases reference index
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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «R»:

  1. Ribozyme Ribozyme
    Ribozyme: An RNA molecule that can catalyze its own chemical reactions....
  2. Rice genome Rice genome
    Rice genome: The first commercially important plant to have its genome sequenced. This feat, completed early in 2001, is particularly important because rice is a staple food for a large portion of the population of the world. With the rice sequence, genes can be located to improve yields and make ri...
  3. Rice rat Rice rat
    Rice rat: A rodent capable of carrying the types of hantavirus that cause HPS (hantavirus pulmonary syndrome) in the US. The rice rat measures 5 to 6 inches for the head and body, plus a very long 4 to 7 inch tail. Rice rats sport short, soft, grayish brown fur on top, and gray or tawny underbellies...
  4. Richard L. Varco Richard L. Varco
    Richard L. Varco: See: Varco, Richard L....
  5. Ricin Ricin
    Ricin: A potent protein toxin made from the waste left over from processing castor beans. The castor plant, which is called Ricinus communis, is found throughout the world. Ricin is fairly easy to extract. Worldwide a million tons of castor beans are processed annually in the production of castor o...
  6. Ricker syndrome Ricker syndrome
    Ricker syndrome: See: Myotonic dystrophy type 2....
  7. Rickets Rickets
    Rickets: A disease of infants and children that disturbs normal bone formation (ossification). Rickets is a failure to mineralize bone. This softens bone (producing osteomalacia) and permits marked bending and distortion of bones. Up through the first third of the 20th century, rickets was largely d...
  8. Rickets, celiac Rickets, celiac
    Rickets, celiac: Rickets caused by failure of the intestines to absorb calcium and fat from foods....
  9. Rickets, hypophosphatemic Rickets, hypophosphatemic
    Rickets, hypophosphatemic: A familial form of rickets characterized by hypophosphatemia (low blood phosphate level), defective intestinal absorption of phosphate, and rickets unresponsive to vitamin D. The basic problem is decreased resorption of phosphate by the tubules in the kidney. There are t...
  10. Rickets, renal Rickets, renal
    Rickets, renal: Rickets-like bone malformations caused by prolonged inflammation of the kidneys....
  11. Rickets, vitamin D resistant Rickets, vitamin D resistant
    Rickets, vitamin D resistant: A rickets-like condition caused by an inborn defect of metabolism, usually in males. Vitamin D cannot be absorbed, and so does not work to treat the illness....
  12. Ricketts, Howard T. Ricketts, Howard T.
    Ricketts, Howard T.: American pathologist and pioneering infectious disease expert (1871-1910) who was the first to establish the identity of the infectious organism that causes Rocky Mountain spotted fever. He and others characterized the basic epidemiologic features of the disease, including the r...
  13. Rickettsia Rickettsia
    Rickettsia: A member of a group of microorganisms that (like viruses) require other living cells for growth but (like bacteria) use oxygen, have metabolic enzymes and cell walls, and are susceptible to antibiotics. Rickettsiae cause a series of diseases named for the American pathologist Howard R...
  14. Rickettsial diseases Rickettsial diseases
    Rickettsial diseases: The infectious diseases caused by the rickettsiae fall into 4 groups:(1) typhus: epidemic typhus, Brill-Zinsser disease, murine (endemic) typhus, and scrub typhus; (2) spotted fever-Rocky Mountain spotted fever, Eastern tick-borne rickettsioses, and rickettsialpox; (3) Q fever...
  15. Rickettsialpox Rickettsialpox
    Rickettsialpox: A mild infectious disease first observed in New York City caused by Rickettsia akari, transmitted from its mouse host by chigger or adult mite bites. There is fever, a dark spot that becomes a small ulcer at the site of the bite, swollen glands (lymphadenopathy) in that region, and a...