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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. Raynaud's phenomenon Raynaud's phenomenon
    Raynaud's phenomenon: A condition resulting in discoloration of fingers and/or toes when a person is exposed to changes in temperature (cold or hot) or emotional events. The skin discoloration occurs because an abnormal spasm of the blood vessels causes a diminished blood supply. Initially, the d...
  2. RBC RBC
    RBC: Short for red blood cells, the cells that carry oxygen and carbon dioxide through the blood. This rather remarkable feat is thanks to hemoglobin, the pigment that makes red cells (and blood) look red. The red blood cells are also known as red corpuscles or erythrocytes (literally, red hollow v...
  3. RCT RCT
    RCT: Randomized controlled trial....
  4. RDA RDA
    RDA: Abbreviation for the Recommended Dietary Allowance. Or, popularly, the Recommended Daily Allowance....
  5. RDIs (Reference Daily Intakes) RDIs (Reference Daily Intakes)
    RDIs (Reference Daily Intakes): A set of dietary references based on the Recommended Dietary Allowances for essential vitamins and minerals and, in selected groups, protein. The name "RDI" replaces the term "U.S. RDA."...
  6. RDS (respiratory distress syndrome) RDS (respiratory distress syndrome)
    RDS (respiratory distress syndrome): Formerly known as hyaline membrane disease, a syndrome of respiratory difficulty in newborn infants caused by a deficiency of a molecule called surfactant. RDS almost always occurs in newborns born before 37 weeks of gestation. The more premature the baby is, th...
  7. Re-uptake Re-uptake
    Re-uptake: See: Reuptake....
  8. Reabsorption Reabsorption
    Reabsorption: Absorbing again. For example, the kidney selectively reabsorbs substances such as glucose, proteins, and sodium which it had already secreted into the renal tubules. These reabsorbed substances return to the blood. ...
  9. Reactant, acute phase Reactant, acute phase
    Reactant, acute phase: See: Acute-phase protein....
  10. Reaction kinetics Reaction kinetics
    Reaction kinetics: Kinetics (with an "s" at the end) refers to the rate of change in a biochemical (or other) reaction, the study of reaction rates. Kinetics is a noun. It is distinct from "kinetic" (an adjective) meaning with movement. The opposite of kinetic is akinetic which means without mo...
  11. Reaction, allergic Reaction, allergic
    Reaction, allergic: A reaction that occurs when the immune system attacks a usually harmless substance (an allergen) that gains access to the body. The immune system calls upon a protective substance called immunoglobulin E (IgE) to fight these invading allergic substances (allergens). Even though e...
  12. Reaction, chemical Reaction, chemical
    Reaction, chemical: A process in which one substance is transformed into another. Thousands of different types of chemical reactions occur in the body and are essential to its structure and function....
  13. Reaction, desmoplastic Reaction, desmoplastic
    Reaction, desmoplastic: This term refers to the growth of fibrous or connective tissue. Some tumors elicit a desmoplastic reaction, the pervasive growth of dense fibrous tissue around the tumor. Scar tissue (adhesion) within the abdomen after abdominal surgery is another type of desmoplastic reactio...
  14. Reaction, hibernation Reaction, hibernation
    Reaction, hibernation: See: SAD....
  15. Reaction, polymerase chain Reaction, polymerase chain
    Reaction, polymerase chain: See: PCR....