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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «U»:

  1. Ulnar nerve Ulnar nerve
    Ulnar nerve: A major nerve in the upper extremity. The ulnar nerve begins in the lower cervical and upper thoracic portions of the spinal cord (from C7 to T1), travels via the brachial plexus down into the arm, through the cubital tunnel at the elbow, and supplies both sensory and motor innervation ...
  2. Ulocarcinoma Ulocarcinoma
    Ulocarcinoma: Cancer of the gums. It is often associated with the use of smokeless (chewing) tobacco. Diagnosis is by observation and confirmed by biopsy. Treatment may include radiation, chemotherapy, and surgery....
  3. Ultrafast CT Ultrafast CT
    Ultrafast CT: Electron beam computerized tomography (EBCT), a new (and controversial) noninvasive test for the detection of coronary artery disease (CAD). Ultrafast computerized tomography is designed to measure calcium deposits in the coronary arteries. In patients with CAD, the plaques which mak...
  4. Ultrasonic-assisted liposuction Ultrasonic-assisted liposuction
    Ultrasonic-assisted liposuction: Liposuction involves the surgical suctioning of fat deposits from specific parts of the body, the most common being the abdomen (the "tummy"), buttocks ("behind"), hips, thighs and knees, chin, upper arms, back, and calves. Liposuction breaks up and "sucks" fat out o...
  5. Ultrasound Ultrasound
    Ultrasound: High-frequency sound waves. Ultrasound waves can be bounced off of tissues using special devices. The echoes are then converted into a picture called a sonogram. Ultrasound imaging, referred to as ultrasonography, allows physicians and patients to get an inside view of soft tissues ...
  6. Ultrasound during pregnancy Ultrasound during pregnancy
    Ultrasound during pregnancy: Ultrasound imaging has been done during pregnancy for over three decades. It has proven to be a very useful and very effective diagnostic procedure. A number of epidemiological studies of pregnancy ultrasound exposure have been done to look at its safety. These inclu...
  7. Ultrasound, Doppler Ultrasound, Doppler
    Ultrasound, Doppler: See: Doppler ultrasound....
  8. Ultrasound, endoscopic Ultrasound, endoscopic
    Ultrasound, endoscopic: See: Endoscopic ultrasound....
  9. Ultrasound, transvaginal Ultrasound, transvaginal
    Ultrasound, transvaginal: A technique in which sound waves are sent out by an ultrasound probe that has been inserted in the vagina. The waves go through the vaginal wall and bounce off the ovaries, and a computer uses the ultrasound echoes to create a picture (a sonogram). Transvaginal ultrasound i...
  10. Ultrasound/Ultrasonography Ultrasound/Ultrasonography
    Ultrasound/Ultrasonography: A test in which high-frequency sound waves (ultrasound) are bounced off tissues and the echoes are converted into a picture (sonogram). ...
  11. Ultraviolet A Ultraviolet A
    Ultraviolet A: One of the three types of invisible light rays (together with ultraviolet B and ultraviolet C) given off by the sun. Although ultraviolet C is the most dangerous type of ultraviolet light in terms of its potential to harm life on earth, it cannot penetrate earth's protective ozone l...
  12. Ultraviolet B Ultraviolet B
    Ultraviolet B: One of the three types of invisible light rays (together with ultraviolet A and ultraviolet C) given off by the sun. Although ultraviolet C is the most dangerous type of ultraviolet light in terms of its potential to harm life on earth, it cannot penetrate earth's protective ozone l...
  13. Ultraviolet C Ultraviolet C
    Ultraviolet C: One of the three types of invisible light rays (together with ultraviolet A and ultraviolet B) given off by the sun. Although ultraviolet C is the most dangerous type of ultraviolet light in terms of its potential to harm life on earth, it cannot penetrate earth's protective ozone l...
  14. Ultraviolet radiation Ultraviolet radiation
    Ultraviolet radiation: Invisible rays that are part of the energy that comes from the sun. Ultraviolet radiation can burn the skin and cause skin cancer. Ultraviolet radiation is made up of three types of rays -- ultraviolet A, ultraviolet B, and ultraviolet C. Although ultraviolet C is the mos...
  15. Umami Umami
    Umami: The taste of substances such as glutamate and monosodium glutamate (MSG) that are found in foods like bouillon and other stocks. Umami is the fifth primary element of taste. The other four are sweet, sour, salty, and bitter. It was discovered in 1907 by Kikunae Ikeda. Umami is the Japanese wo...