Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «O»:
OSA (obstructive sleep apnea)
OSA (obstructive sleep apnea) : Abbreviation for obstructive sleep apnea (and also for the Optical Society of America)....
Oscillating vision: See: Oscillopsia....
Oscillopsia: Oscillating vision. Swinging vision. In oscillopsia, objects seem to swing, move back and forth, jerk, or wiggle. A classical language hybrid derived from the Latin oscillo, to swing, + the Greek opsis, vision....
Oscitation: The act of yawning, the involuntary opening of the mouth with respiration, breathing first inward, then outward.
Yawning is often caused by suggestion. Repeated yawning is commonly a sign of drowsiness. It can also sometimes be a sign of depression....
Osgood-Schlatter disease: A condition involving inflammation and sometimes tearing of ligaments within the knee and lower leg. Treatment is by
rest, casting if necessary, and sometimes surgery.
Osgood-Schlatter disease is caused by repetitive stress or tension on a part of the growth area of the u...
OSHA: The Occupational Safety and Health Administration, 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 create...
These are small (the size of split peas), tender, transient nodules in the pads of fingers and toes and the palms and soles. They are a highly diagnostic sign of bacterial infection of the heart (subacute bacterial endocarditis). Named for the Canadian-born physician Sir William Osle...
Osler, Sir William
Osler, Sir William: Renowned Canadian physician (1849-1919) who taught at McGill University, the University of Pennsylvania, Johns Hopkins and Oxford University and who first described many medical phenomena now named after him such as the Osler-Rendu-Weber syndrome and Osler's nodes as well as many...
Osler-Rendu-Weber syndrome: See: Hereditary hemorrhagic telangiectasia....
Osmolar: In biochemistry, referring to the osmolarity, the concentration of osmotically active particles in solution, which may be quantitatively expressed in osmoles of solute per liter of solution....
Osmolarity: The concentration of osmotically active particles in solution, which may be quantitatively expressed in osmoles of solute per liter of solution. See also: Plasma osmolarity....
Osmolarity, plasma: See: Plasma osmolarity....
Osmole: In biochemistry, the amount of a substance that dissociates in solution to form one mole of osmotically active particles....
Osseous: Having to do with the bone, consisting of
bone, or resembling bone.
From "os" which is a synonym for "bone." The Latin word "os" means "bone" as does the related Greek word "osteon."
Ossicle: Any small bone, such as the tiny bones
within the human ear....