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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 - «P»:

  1. Perineum Perineum
    Perineum: The area between the anus and the scrotum in the male and between the anus and the vulva (the labial opening to the vagina) in the female. An episiotomy is a surgical procedure to widen the outlet of the birth canal to facilitate delivery of the baby and avoid a jagged rip of the perineum....
  2. Period, gestation Period, gestation
    Period, gestation: The period of development of the young from the time of conception until birth. For humans the full gestation period is normally 9 months. The word "gestation" comes from the Latin "gestare" meaning "to carry or to bear."...
  3. Period, incubation Period, incubation
    Period, incubation: In medicine, the time from the moment of exposure to an infectious agent until signs and symptoms of the disease appear. For example, the incubation period of chickenpox is 14-16 days. In biology, the incubation period is the time needed for any particular process of developme...
  4. Periodic abstinence Periodic abstinence
    Periodic abstinence: Also known as fertility awareness, natural family planning, and the rhythm method, this approach entails not having sexual intercourse on the days of a woman's menstrual cycle when she could become pregnant or using a barrier method (such as a condom, the diaphragm or a cervical...
  5. Periodic breathing Periodic breathing
    Periodic breathing: Clusters of breaths separated by intervals of apnea (no breathing) or near-apnea. As opposed to normal breathing which is usually regular. Periodic breathing was originally thought to arise from serious neurologic or cardiovascular disease and therefore to carry a poor outlook. I...
  6. Periodic fever Periodic fever
    Periodic fever: Recurrences of fever that last from a few days to a few weeks and are separated by symptom-free intervals of varying duration. This pattern of fever can be caused by recurrent infection, malignancy or noninfectious inflammatory disorders. Periodic fever that lasts for more than tw...
  7. Periodontal Periodontal
    Periodontal: The word "periodontal" literally means "around the tooth." Periodontal diseases are bacterial infections that destroy the attachment fibers and supporting bone that hold the teeth in the mouth. Left untreated, these diseases can lead to tooth loss. The main cause of periodontal disease ...
  8. Periodontal disease Periodontal disease
    Periodontal disease: A bacterial infection that destroys the attachment fibers and supporting bone that hold the teeth in the mouth. Left untreated, these diseases can lead to tooth loss. The main cause of periodontal disease is bacterial plaque, a sticky, colorless film that constantly forms o...
  9. Periodontics Periodontics
    Periodontics: Periodontics is the branch of dentistry concerned with the prevention, diagnosis and treatment of diseases affecting the gums and supporting structures of the teeth. Periodontists are also expert in the placement and maintenance of dental implants. The word "periodontal" literally m...
  10. Periodontitis Periodontitis
    Periodontitis: Gum disease. The word "periodontitis" literally means "inflammation around the tooth." Periodontitis and all periodontal diseases are bacterial infections that destroy the attachment fibers and supporting bone that hold the teeth in the mouth. Left untreated, these diseases can l...
  11. Perionychia Perionychia
    Perionychia: An inflammation of the folds of tissue surrounding the nail due to infection. The infection may be bacterial (most commonly, staph or strep) or to fungal. "Perionychia" is composed of "peri-" meaning around or surrounding + the Greek word "onyx" for nail = around the nail. The tissue a...
  12. Perionychium Perionychium
    Perionychium: The tissue surrounding the nail, whether it be a fingernail or a toenail, including the tissue bordering the root and sides of the nail. The word is composed of "peri-" meaning around or surrounding + the Greek word "onyx" for nail = around the nail....
  13. Perioperative Perioperative
    Perioperative: Literally, around (the time of) surgery. More specifically, the period of time extending from when the patient goes into the hospital, clinic, or doctor's office for surgery until the time the patient is discharged home....
  14. Periosteal Periosteal
    Periosteal: Pertaining to the periosteum, a dense membrane composed of fibrous connective tissue that closely wraps (invests) all bone, except the bone of articulating surfaces in joints which are covered by synovial membranes. Peri- is a prefix borrowed from the Greek meaning "around or about"...
  15. Periosteoma Periosteoma
    Periosteoma: A benign tumor arising from the periosteum, the dense membrane composed of fibrous connective tissue that closely wraps (invests) all bone (except the articular surfaces of bone in joints which are covered by synovial membranes). Also called a periostoma....