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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «P»:

  1. Proportional counter Proportional counter
    Proportional counter: A device for measuring radioactivity. More technically, a proportional counter counts the emission of radioactive particles which permits the discrimination between particles or rays of different energies....
  2. Proposita Proposita
    Proposita: A female through whom a family medically comes to light (is first ascertained). Also called the proband or index case. The male counterpart of a proposita is a propositus....
  3. Propositus Propositus
    Propositus: A male through whom a family medically comes to light (is first ascertained). Also called the proband or index case. The feminine of propositus is proposita....
  4. Proprioception Proprioception
    Proprioception: The ability to sense stimuli arising within the body. Even if you are blindfolded, you know through proprioception if your arm is above your head or hanging by your side. The word "proprioception" was coined in 1906 by the English neurophysiologist Charles Sherrington who rece...
  5. Propylthiouracil (PTU) Propylthiouracil (PTU)
    Propylthiouracil (PTU): A drug that blocks the production of thyroid hormone by the thyroid gland. PTU is used to treat hyperthyroidism, to reduce the excessive thyroid activity before surgery and to treat and maintain patients not having surgery....
  6. Prospective Prospective
    Prospective: Looking forward. A prospective study or a prospective clinical trial is one in which the participants are identified and then followed forward in time....
  7. Prospective study Prospective study
    Prospective study: A study in which the subjects are identified and then followed forward in time....
  8. Prostaglandin Prostaglandin
    Prostaglandin: One of a number of hormone-like substances that participate in a wide range of body functions such as the contraction and relaxation of smooth muscle, the dilation and constriction of blood vessels, control of blood pressure, and modulation of inflammation. Prostaglandins are derived ...
  9. Prostaglandin E2 Prostaglandin E2
    Prostaglandin E2: One of the prostaglandins, a group of hormone-like substances that participate in a wide range of body functions such as the contraction and relaxation of smooth muscle, the dilation and constriction of blood vessels, control of blood pressure, and modulation of inflammation. Prost...
  10. Prostaglandin F2-alpha Prostaglandin F2-alpha
    Prostaglandin F2-alpha: One of the prostaglandins, a group of hormone-like substances that participate in a wide range of body functions such as the contraction and relaxation of smooth muscle, the dilation and constriction of blood vessels, control of blood pressure, and modulation of inflammati...
  11. Prostate Prostate
    Prostate: A gland within the male reproductive system that is located just below the bladder. Chestnut shaped, the prostate surrounds the beginning of the urethra, the canal that empties the bladder. The prostate is actually not one but many glands, 30-50 in number, between which is abundant tissu...
  12. Prostate acid phosphatase Prostate acid phosphatase
    Prostate acid phosphatase: (PAP) Prostatic acid phosphatase, an enzyme that is produced by the prostate (and other tissues) and that is elevated in some patients with prostate cancer....
  13. Prostate cancer Prostate cancer
    Prostate cancer: An uncontrolled (malignant) growth of cells in the prostate gland which is located at the base of the urinary bladder and is responsible for helping control urination as well as forming part of the semen. Prostate cancer is the second leading cause of death of males in the U.S....
  14. Prostate cancer gene Prostate cancer gene
    Prostate cancer gene: One of the genes that influences the origin and/or progression of prostate cancer, cancer of the prostate gland. Prostate cancer genes are scattered around in the human genome. They have been found to date on chromosome Xq27-q28 (on the X chromosome in region Xq27-q28) and on ...
  15. Prostate cancer gene BRCA2 Prostate cancer gene BRCA2
    Prostate cancer gene BRCA2: A gene that normally acts to restrain the growth of cells but which, when mutated, is responsible for a significant fraction of early-onset cases of prostate cancer. BRCA2 was originally identified in breast cancer. It is not the only gene involved in prostate cancer. See...