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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 - «S»:

  1. Synthesis Synthesis
    Synthesis: Putting together different entities to make a whole which is new and different. In biochemistry, synthesis refers specifically to the process of building compounds from more elementary substances by means of one or more chemical reactions. For example, the adipocyte is a cell that is spe...
  2. Synuclein Synuclein
    Synuclein: A family of structurally related proteins that are prominently expressed in the central nervous system. See: Alpha-synuclein....
  3. Syphilis Syphilis
    Syphilis: A sexually transmitted disease caused by Treponema pallidum, a microscopic organism called a spirochete. This worm-like, spiral-shaped organism infects people by burrowing into the moist mucous membranes of the mouth or genitals. From there, the spirochete produces a non-painful ulcer ...
  4. Syphilis test (FTA-ABS) Syphilis test (FTA-ABS)
    Syphilis test (FTA-ABS): The fluorescent treponemal antibody absorbed (FTA-ABS) test for syphilis is a blood serum screening test designed to demonstrate the presence or absence of specific antibodies directed against the organism (Treponema pallidum) responsible for syphilis. The test detects the ...
  5. Syphilis test, RPR Syphilis test, RPR
    Syphilis test, RPR: Rapid plasma reagin, a blood test for syphilis that looks for an antibody that is present in the bloodstream when a patient has syphilis. A negative (nonreactive) RPR is compatible with a person not having syphilis, but in the early stages of the disease, the RPR often gives ...
  6. Syphilis test, VDRL Syphilis test, VDRL
    Syphilis test, VDRL: A blood test for syphilis (VDRL stands for Venereal Disease Research Laboratory) that detects an antibody that is present in the bloodstream when a patient has syphilis. A negative (nonreactive) VDRL is compatible with a person not having syphilis, but in the early stages of...
  7. Syphilis, congenital Syphilis, congenital
    Syphilis, congenital: Infection of a fetus or newborn with syphilis. Syphilis in a fetus can cause deformity, particularly of the long bones, or death. Syphilis infection acquired at birth is also dangerous. See also TORCH infection....
  8. Syphilis, tertiary Syphilis, tertiary
    Syphilis, tertiary: The third stage of syphilis, in which the syphilis spirochetes infect the brain and other organs of the body. Dementia is a common outcome. Tertiary syphilis can develop many years after an initial untreated infection. The spirochetes can cause extensive damage in the body,...
  9. Syphilitic Syphilitic
    Syphilitic: 1. Relating to syphilis, caused by it, or suffering from it. 2. A person with syphilis. From the French syphilitique....
  10. Syringe Syringe
    Syringe: A device used in medicine to inject fluid into or withdraw fluid from the body. Medical syringes consist of a needle attached to a hollow cylinder that is fitted with a sliding plunger. The downward movement of the plunger injects fluid; upward movement withdraws fluid. Medical syring...
  11. Syringoma Syringoma
    Syringoma: A benign (non-cancerous) skin tumor that derives from eccrine cells, specialized cells that are related to sweat glands. The skin lesions usually appear during puberty or adult life, and consist of small bumps one to three millimeters in diameter that form underneath the surface of th...
  12. System, autonomic nervous System, autonomic nervous
    System, autonomic nervous: Part of the nervous system that was once thought to be functionally independent of the brain. The autonomic nervous system regulates key functions of the body including the activity of the heart muscle (see below), the smooth muscles (e.g., the muscles of the intesti...
  13. System, cardiac conduction System, cardiac conduction
    System, cardiac conduction: The electrical conduction system that controls the heart rate. This system generates electrical impulses and conducts them throughout the muscle of the heart, stimulating the heart to contract and pump blood. Among the major elements in the cardiac conduction system are ...
  14. System, cardiovascular System, cardiovascular
    System, cardiovascular: The circulatory system which comprises the heart and blood vessels. The system carries nutrients and oxygen to the tissues of the body and removes carbon dioxide and other wastes from them. The cardiovascular system is a closed tubular system in which the blood is propelled...
  15. System, central nervous (CNS) System, central nervous (CNS)
    System, central nervous (CNS): That part of the nervous system that consists of the brain and spinal cord. The central nervous system (CNS) is one of the two major divisions of the nervous system. The other is the peripheral nervous system (PNS), that part of the nervous system that lies outside t...