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Drugs and diseases reference index

Drugs and diseases reference index

Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «X»:

  1. XXY XXY
    XXY: See: Klinefelter syndrome....
  2. XY XY
    XY: The most frequent sex chromosome complement in human males....
  3. Xylitol Xylitol
    Xylitol: A sweetener found in plants that is used as a substitute for sugar. Xylitol is considered a nutritive sweetener because it provides calories, just like sugar. (Saccharin is an example of a nonnutritive sweetener, one that has no calories.)...
  4. XYY XYY
    XYY: An extra Y chromosome in a male. See: XYY syndrome....
  5. XYY syndrome XYY syndrome
    XYY syndrome: A chromosomal disorder that affects males only, caused by the presence of an extra Y chromosome. Symptoms may include increased height, speech delays, learning disabilities, mild to moderate mental retardation, and behavioral disturbance. Also known as polysomy Y syndrome....