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screen

 [skrēn]
1. a framework or agent used as a shield or protector; called also protectant and protective.
2. to separate well individuals in a population from those who have an undiagnosed disease, defect, or other pathologic condition or who are at high risk by means of tests, examinations, or other procedures. See also screening.
Bjerrum screen tangent screen.
fluoroscopic screen a phosphorescent screen that shows the movement and relationship of organs and structures in fluoroscopy.
intensifying screen a fluorescent screen used in conjunction with x-ray film to enhance the effect of the radiation and reduce dosage to the patient. The screen must be matched to the emissivity range; the emissivity of phosphorus is similar to that of the human eye, so that phosphors absorb x-ray energy and convert it to visible light.
tangent screen a large square of black cloth with a central mark for fixation; used with a campimeter in mapping the field of vision.

screen

(skrēn),
1. A sheet of any substance used to shield an object from any influence, such as heat, light, or x-rays.
See also: screen memory.
2. A sheet on which an image is projected.
See also: screen memory.
3. Formerly, to make a fluoroscopic examination.
See also: screen memory.
4. In psychoanalysis, concealment, as one image or memory concealing another.
See also: screen memory.
5. To examine, evaluate; to process a group to select or separate certain individuals from it.
6. A thin layer of crystals that converts x-rays to light photons to expose film; used in a cassette to produce radiographic images on film.
[Fr. écran]

screen

(skrēn)
1. a structure resembling a curtain or partition, used as a protection or shield, e.g., against excessive radiation exposure.
2. a large flat surface upon which light rays are projected.
3. protective (2).
4. to examine by fluoroscopy (Great Britain).
5. to separate well individuals in a population from those with an undiagnosed pathologic condition by means of tests, examinations, or other procedures.

skin screen  a substance applied to the skin to protect it from the sun's rays or other noxious agents.
solar screen , sun screen sunscreen.

screen

(skrēn)
n.
1. A movable device that serves to protect, conceal, or divide.
2. A surface or device on which an image is displayed for viewing.
3. A screen memory.
v.
1. To process a group of people in order to select or separate certain individuals from it.
2. To test or examine for the presence of disease or infection.
3. To subject to genetic screening.

screen

Molecular biology
verb To detect a phenotype’s presence or absence by testing for growth under different conditions (e.g., plus and minus an auxotrophic supplement or permissive and non-permissive conditions), usually done by replica plating or patching colonies onto each type of plate.
 
Public health
noun
(1) Any systematic activity—e.g., measuring BP, glucose or cholesterol; pap smear; or other activity—which attempts to identify a particular disease in persons in a particular population.
(2) A popular term for a solar protection barrier.

screen

Public health
1. Any systematic activity–eg, measuring BP, glucose or cholesterol, pap smear, or other activity, which attempts to identify a particular disease in persons in a particular population. See Drug screen, General health screen, Laxative screen, Memory Impairment screen, Metabolic screen, Neonatal screen.
2. A solar protection barrier. See Sunscreen.

screen

(skrēn)
1. A sheet of any substance used to shield an object from any influence (e.g., heat, light, x-rays).
2. A sheet on which an image is projected.
3. psychoanalysis Concealment, as one image or memory concealing another.
See also: screen memory
4. To examine, evaluate; to process a group to select or separate certain individuals from it.
5. A thin layer of crystals that converts x-rays to light photons to expose film; used in a cassette to produce radiographic images on film.
6. To examine for the presence or absence of specified characteristics to determine whether further examination is needed.
[Fr. écran]

screen,

n initial examination to determine the existence of a disease or disorder.

screen

(skrēn)
1. A sheet of any substance used to shield an object from any influence, such as heat, light, or x-rays.
2. A sheet on which an image is projected.
3. To examine, evaluate; to process a group to select or separate some individuals from it.
Synonym(s): screening (1).
[Fr. écran]

screen

1. a framework or agent used as a shield or protector.
2. to examine.

fast screen
permits big reduction in exposure to x-ray beam.
screen film
prepared to be used with intensifying screens. The standard film and marketed as being of standard, fast or ultrafast speeds.
rare-earth screen
see rare-earth intensifying screen.
References in periodicals archive ?
For instance, if you are doing 6-inch minus today, and you want to do 3-inch minus tomorrow, you have to remove all the screens that are on the trommel and put different ones on," he says.
With the aid of a vacuum, the perforated rollers of the screen suck up all recovered paper components, causing flexible components to be separated from boxboard material.
Images and text that are routinely repeated-sometimes several hundred times per day--will eventually create ghost images that permanently burn into the screen.
The screen tests test the subject's emotional immunity.
Second, it must exert uniform contact between the screen and the film.
In addition, they provide more open area on the screen cloth, which "allows more material to pass through the screen and increases the producer's hourly output," he says.
Photo: (Color) The screens, two in California, will resembl e the one in Utah's Zion National Theatre.
The unit is supported on a circular base by springs, allowing the screen assembly to vibrate freely without transmitting vibration to the plant floor.
Switch the screen at the point where X1 now guards Wing 2 and X2 defends the original penetrator, 1 (Diag.
The screens have been credited with halting new infections from blood or blood products.
Steve Cohen, president of The Screen Machine, Reynoldsburg, Ohio, says that after the product mix has been determined, C&D recyclers should consider the manner in which they will feed the machine.
12: 4 runs off the screen set by 5 and looks for the pass from 1 at the top of the circle.