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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «O»:

  1. Organic brain syndrome Organic brain syndrome
    Organic brain syndrome: Psychiatric or neurological symptoms, including problems with attention, concentration, and memory, confusion, anxiety, and depression, arising from damage to or disease in the brain. Also called organic mental disorder. See also: Neurobiological disorder....
  2. Organic dust toxic syndrome Organic dust toxic syndrome
    Organic dust toxic syndrome: A flu-like illness due to the inhalation of grain dust with symptoms including fever, chest tightness, cough and muscle aching. The inhalation of the grain dust may occur in an agricultural setting or from covering a floor with straw, etc....
  3. Organisation Mondiale de la Sante Organisation Mondiale de la Sante
    Organisation Mondiale de la Sante: The French name for the World Health Organization (WHO). See: World Health Organization....
  4. Organotherapy Organotherapy
    Organotherapy: The use of extracts of animal glands or organs to treat disease. Pituitary extracts from pigs, for example, were used for many years to treat hormone disorders....
  5. Organs of reproduction, female Organs of reproduction, female
    Organs of reproduction, female: The internal genital structures of the female include the ovaries, the Fallopian tubes, the uterus (womb) and the vagina. The ovaries or "egg sacs" are a pair of female reproductive organs located in the pelvis, one on each side of the uterus. Each ovary is about the...
  6. Organs of reproduction, male Organs of reproduction, male
    Organs of reproduction, male: The sum total of all the male genital organs, both internal and external, that are concerned with reproduction, including: The male external genitalia -- the penis, the male urethra, and the scrotum; and The male internal genitalia -- the testis, epididymis, ductus d...
  7. Orgasm Orgasm
    Orgasm: The climax of coitus, consisting of a series of involuntary muscle contractions in the anus, lower pelvic muscles, and sexual organs, accompanied by a sudden release of endorphins providing a feeling of euphoria. In the male, orgasm involves rapid rhythmic contractions of the prostate, uret...
  8. Orgasmic disorder Orgasmic disorder
    Orgasmic disorder: See: Anorgasmia....
  9. Orgasmic dysfunction Orgasmic dysfunction
    Orgasmic dysfunction: See: Anorgasmia....
  10. Orgasmic inhibition Orgasmic inhibition
    Orgasmic inhibition: See: Anorgasmia....
  11. Oriental lung fluke Oriental lung fluke
    Oriental lung fluke: Paragonimus westermani. See: Paragonimiasis....
  12. Oriental medicine (traditional) Oriental medicine (traditional)
    Traditional oriental medicine: This is a sophisticated form of medicine that is comprised of many systematic techniques and methods, including acupuncture, herbal medicine, acupressure, qi gong, and oriental massage. The most striking characteristic of oriental medicine is its emphasis on dia...
  13. Orientation, anatomic terms of Orientation, anatomic terms of
    Orientation, anatomic terms of: See Anatomic terms of orientation....
  14. Orifice Orifice
    Orifice: An opening. The mouth for example is an orifice. ...
  15. Ornithine Ornithine
    Ornithine: An amino acid that is not found in protein but is important in the formation of urea and the disposal of excess nitrogen. Ornithine is produced when urea is split off from arginine and ornithine is itself converted into citrulline....