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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. Sigmoidoscopy, flexible Sigmoidoscopy, flexible
    Sigmoidoscopy, flexible: Inspection of the inside of the rectum and lower part of the colon using a thin flexible lighted tube (a flexible sigmoidoscope). This procedure may be done to find the cause of diarrhea, constipation, abdominal pain, intestinal bleeding or look for polyps or cancer. With f...
  2. Sign Sign
    Sign: Any objective evidence of disease. Gross blood in the stool is a sign of disease. It can be recognized by the patient, doctor, nurse, or others. In contrast, a symptom is, by its nature, subjective. Abdominal pain is a symptom. It is something only the patient can know....
  3. Sign language Sign language
    Sign language: A language that employs signs made with the hands and other movements, including facial expressions and postures of the body, used primarily by people who are deaf. There are many different sign languages as, for example, British and American sign languages. British sign language (...
  4. Sign of pregnancy Sign of pregnancy
    Sign of pregnancy: See entry to: Pregnancy symptom....
  5. Sign, Babinski Sign, Babinski
    Sign, Babinski: A neurologic reflex that constitutes an important medical examination based upon what the big toe does when the sole of the foot is stroked. If the big toe goes up, that may well mean trouble. The Babinski sign is obtained by stimulating the external portion (the outside) of the ...
  6. Sign, Gottron Sign, Gottron
    Sign, Gottron: A scaly, patchy redness over the knuckles seen in patients with dermatomyositis, an inflammatory muscle disorder. (See polymyositis)....
  7. Sign, Kernig Sign, Kernig
    Sign, Kernig: A clinical hallmark of meningitis, inflammation of the meninges, the membranes covering the brain and spinal cord. The test for Kernig sign is done by having the person lie supine (flat on the back), flex the thigh so that it is at a right angle to the trunk, and completely extend ...
  8. Sign, Lhermitte Sign, Lhermitte
    Sign, Lhermitte: Sudden transient electric-like shocks extending down the spine triggered by flexing the head forward. Due to a disorder such as compression of the cervical spine (the portion of the spinal cord within the neck). One patient who experienced Lhermitte sign wrote that: "Looking down to...
  9. Sign, Macewen Sign, Macewen
    Sign, Macewen: A sign to detect hydrocephalus and brain abscess. Percussion (tapping) on the skull at a particular spot (near the junction of the frontal, temporal and parietal bones) yields an unusually resonant sound in the presence of hydrocephalus or a brain abscess. Named for Sir Will...
  10. Sign, Tinel's Sign, Tinel's
    Sign, Tinel's: An examination test that is used by doctors to detect an irritated nerve. Tinel's sign is performed by lightly banging (percussing) over the nerve to elicit a sensation of tingling or "pins and needles" in the distribution of the nerve. For example, in a person with carpal tunnel synd...
  11. Sign, toe Sign, toe
    Sign, toe: An important neurologic test based upon what the toes do when the sole of the foot is stimulated. If the big toe goes up, that may mean trouble. The toe sign, also called the Babinski reflex, is obtained by stimulating the external portion (the outside) of the sole. The examiner begin...
  12. Signal transduction Signal transduction
    Signal transduction: A basic process in molecular cell biology involving the conversion of a signal from outside the cell to a functional change within the cell. A signal (such as a hormone or neurotransmitter) interacts with a receptor on the cell surface; this interaction causes a change in a se...
  13. Signal transduction pathway Signal transduction pathway
    Signal transduction pathway: The course by which a signal from outside a cell is converted to a functional change within the cell....
  14. Signature Signature
    Signature: 1) That part of the prescription that contains the doctor's directions to the patient. For example, the signature might say "take twice daily with food". Also known as the sig.. 2) The outward appearance of a natural object, which was once taken as a token of its special properties. ...
  15. Sikimitoxin Sikimitoxin
    Sikimitoxin: Poisonous substance found in the Japanese star anise, which is also called sikimi....