Category: S

Abnormal reflections of light seen on the ophthalmoscopic examination of the retina of persons with long-standing, uncontrolled hypertension.  

A brass wire used in dentistry to separate teeth before banding them.  

A device consisting of increasing thicknesses of absorber through which radiographs are taken to determine the amounts of radiation reaching the film.  

A compression wave produced by a shock such as an earthquake or explosion that is characterized by a sudden change in air pressure, density, and velocity.  

The internal friction of a fluid, measured by comparing the rate of flow of the liquid through a tube with that of some standard liquid, or by measuring the resistance to rotating paddles.  

A rabies virus obtained from an infected animal rather than from a laboratory strain.  

An infection caused by a virus that remains dormant in the body for a prolonged period before causing signs and symptoms of illness. Such viruses may require years to incubate before causing diseases. Examples include progressive multifocal leukoencephalopathy and subacute sclerosing panencephalitis.  

An alphavirus typically found in South Africa or Oceania that is disseminated to humans by mosquitoes of the genus Culex. It can cause a transient febrile illness accompanied by a diffuse maculopapular rash and muscle and joint pains.  

A container that holds enough medication for one patient’s immediate needs. Single-dose vials should not be reused or refilled.  

Vertigo in which the patient has the sensation of turning or rotating. Vertigo where the patient experiences a sensation of spinning around.