Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «O»:
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....
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....
Organisation Mondiale de la Sante
Organisation Mondiale de la Sante: The French name for the World Health Organization (WHO). See: World Health Organization....
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
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...
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...
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...
Orgasmic disorder: See: Anorgasmia....
Orgasmic dysfunction: See: Anorgasmia....
Orgasmic inhibition: See: Anorgasmia....
Oriental lung fluke
Oriental lung fluke: Paragonimus westermani.
Oriental medicine (traditional)
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...
Orientation, anatomic terms of
Orientation, anatomic terms of: See Anatomic terms of orientation....
Orifice: An opening. The mouth for example is an orifice. ...
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....