To determine the presence of a disease or its characteristics in a broad community or a selected group.
In the realm of medicine, any examination or methodology employed to identify individuals with a heightened probability of possessing a particular ailment, or to detect the presence of specific substances within bodily fluids or tissues.
Something that severs or provides protection.
Commonly used to describe an X-ray procedure where the patient stands behind a fluorescent screen while the radiologist observes a continuous X-ray image displayed on the front of the screen.