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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «T»:

  1. Toxin, anthrax Toxin, anthrax
    Toxin, anthrax: The toxic substance secreted by the bacterium Bacillus anthracis, the causative agent of the disease anthrax. Anthrax toxin is made up of three proteins. One is protective antigen and two are enzymes that are called edema factor and lethal factor. The protective antigen binds to s...
  2. Toxin, botulinum Toxin, botulinum
    Toxin, botulinum: See: Botulinum toxin....
  3. Toxo (toxoplasmosis) Toxo (toxoplasmosis)
    Toxo (toxoplasmosis): An infection caused by a single-celled parasite named Toxoplasma gondii that may invade tissues and damage the brain, especially of the fetus and newborn. The parasite Toxoplasma gondii is very common (more than 60 million people in the US carry it) but few are aware of it beca...
  4. Toxoplasma gondii Toxoplasma gondii
    Toxoplasma gondii: A single-celled parasite that causes toxoplasmosis (toxo) . Toxoplasma gondii is very common (more than 60 million people in the US carry it) but few are aware of it because the immune system often keeps the parasite from causing illness. The usual symptoms of toxo are similar to...
  5. Toxoplasmosis (toxo) Toxoplasmosis (toxo)
    Toxoplasmosis (toxo): An infection caused by a single-celled parasite named Toxoplasma gondii that may invade tissues and damage the brain, especially of the fetus and newborn. The parasite Toxoplasma gondii is very common (more than 60 million people in the US carry it) but few are aware of it beca...
  6. tPA tPA
    tPA: See: Tissue plasminogen activator....
  7. TPH2 TPH2
    TPH2: Tryptophan hydroxylase 2, also known as neuronal tryptophan hydroxylase (NTPH), the key rate-limiting enzyme in the synthesis of serotonin (5-hydroxytryptamine, or 5HT). 5HT is causally involved in numerous activities in the central nervous system, and it also has other functions including the...
  8. TPN TPN
    TPN: Total parenteral nutrition, intravenous feeding that provides a patient with all of the fluid and the essential nutrients when they are unable to feed themselves by mouth....
  9. Trabecula Trabecula
    Trabecula: A partition which divides or partly divides a cavity. One of the strands of connective tissue projecting into an organ that constitutes part of the framework of the organ as, for example, the trabeculae of the spleen. One of a number of small interconnecting rods of bone making up a mas...
  10. Trachea Trachea
    Trachea: A tube-like portion of the breathing or "respiratory" tract that connects the "voice box" (larynx) with the bronchial parts of the lungs. Each time we inhale (breathe in), air goes into our nose or mouth, then through the larynx, down the trachea, and into our lungs. ...
  11. Trachelectomy Trachelectomy
    Trachelectomy: Surgical removal of the cervix, the lower portion of the uterus that protrudes into the vagina. Trachelectomy is done in younger women with early cancer of the cervix (with a tumor no larger than 2-3 centimeters). In this surgery, the cervix and the upper part of the vagina are remove...
  12. Tracheoesophageal puncture Tracheoesophageal puncture
    Tracheoesophageal puncture: A small opening made by a surgeon between the esophagus and the trachea. A valve keeps food out of the trachea but lets air into the esophagus for esophageal speech....
  13. Tracheostomy Tracheostomy
    Tracheostomy: A surgical operation to create an opening (stoma) into the windpipe (the trachea). The opening itself can also be called a tracheostomy. A tracheostomy may be needed on an emergency basis to permit a person to breathe who has severe narrowing or blockage (obstruction) of their upp...
  14. Tracheostomy button Tracheostomy button
    Tracheostomy button: A 1/2- to 1 1/2-inch-long plastic tube placed in the stoma to keep it open....
  15. Tracheostomy tube Tracheostomy tube
    Tracheostomy tube: A 2- to 3-inch metal or plastic tube that keeps the stoma and trachea open. Also called a trach ("trake") tube....