Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «O»:
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Occipital hematoma
Occipital hematoma: A hematoma (collection of blood) in the occipital region (at the back of the head). An occipital hematoma may be either subdural or epidural.
In an occipital epidural hematoma, the bleeding occurs between the skull and the dura (the brain cover). The bleeding is from an injury t...
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Occiput
Occiput: The back of the head. A direct borrowing of the Latin word for the part of the head opposite the front....
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Occlude
Occlude: 1 To close, obstruct, or prevent the passage. To occlude an artery is to occlude the flow of blood. 2 To bring together. To occlude the teeth is to align the upper and lower teeth, as for chewing....
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Occlusion
Occlusion: The act of occluding. See: Occlude....
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Occult
Occult: Hidden.
Occult blood is hidden from the eye but is
nonetheless present and can be detected by chemical tests. Spina bifida occulta is a hidden defect in the spinal column. ...
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Occult stool blood test
Occult stool blood test: A test to check for hidden blood in the feces, the stool....
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Occupational disease
Occupational disease: A disease due to a factor in a person's occupation. For example, lung disease in miners.
Occupational medicine was founded by the Italian physician Bernardino Ramazzini (1633-1714). His De Morbis Artificium (On Artificially Caused Diseases) published in 1700 was the first syst...
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Occupational medicine
Occupational medicine: The field of medicine encompassing occupational disease, diseases due to factors in people's occupations. For example, lung disease in miners.
Occupational medicine was founded by the Italian physician Bernardino Ramazzini (1633-1714). His De Morbis Artificium (On Artificiall...
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Occupational Safety and Health Administration
Occupational Safety and Health Administration: OSHA, an agency of the US government (under the Department of Labor) with the responsibility of ensuring safety at work and a healthful work environment.
OSHA's mission is to prevent work-related injuries, illnesses and deaths. Since OSHA was created ...
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Occupational Safety and Health, Nat'l Institut for
Occupational Safety and Health, National Institute for: Better known as NIOSH, the National Institute for Occupational Safety and Health is a US Federal agency responsible for conducting research and making recommendations for the prevention of work-related disease and injury.
Despite its name (wh...
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Occupational therapist
Occupational therapist: A licensed health professional who is trained to evaluate patients with joint conditions, such as arthritis, to determine the impact the disease on their activities of daily living. Occupational therapists can design and prescribe assistive devices that can improve the quali...
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OCD
OCD: 1. Obsessive-compulsive disorder; 2. Osteochondritis dissecans....
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Ocean itch
Ocean itch: An intensely itchy rash due to contact with the tiny thimble jellyfish (Linuche unguiculata).
These jellyfish are common between March and August in the waters off of Florida and in the Gulf of Mexico and the Caribbean Sea. There may be no adult jellyfish around as a warning. The jell...
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OCG
OCG: Oral cholecystogram....
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Ochronosis
Ochronosis: 1. Deposition of dark pigment in connective tissues, usually due to alkaptonuria or exposure to chemicals such as phenolic compounds or hydroquinone.
2. Sometimes used as a synonym for alkaptonuria....
