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Screening   /skrˈinɪŋ/   Listen
noun
Screening  n.  The process of examining or testing objects methodically to find those having desirable properties. See screen 3. Note: In the pharmaceutical industry, pharmaceutical screening involves testing a large number of samples of substances to find those having desirable pharmacological activity; those samples which have the property sought are called active or positive in the screen. The substances tested may be pure compounds with known structure, mixtures of pure compounds, or complex mixtures obtained by extraction from living organisms. There are often additional sets of test performed on active samples, called counterscreening to eliminate those samples that may also possess undesirable properties. In the case of screening of mixtures from living organisms, a type of counterscreening called dereplication is usually performed, to determine if the active sample contains a known compound which has previously been studied.



verb
Screen  v. t.  (past & past part. screened; pres. part. screening)  
1.
To provide with a shelter or means of concealment; to separate or cut off from inconvenience, injury, or danger; to shelter; to protect; to protect by hiding; to conceal; as, fruits screened from cold winds by a forest or hill. "They were encouraged and screened by some who were in high commands."
2.
To pass, as coal, gravel, ashes, etc., through a screen in order to separate the coarse from the fine, or the worthless from the valuable; to sift.
3.
To examine a group of objects methodically, to separate them into groups or to select one or more for some purpose. As:
(a)
To inspect the qualifications of candidates for a job, to select one or more to be hired.
(b)
(Biochem., Med.) To test a large number of samples, in order to find those having specific desirable properties; as, to screen plant extracts for anticancer agents.






Collaborative International Dictionary of English 0.48








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"Screening" Quotes from Famous Books



... Discovering much the temper of her sire. For oft, as if in her the stream of mild Maternal nature had reversed its course, She brings her infants forth with many smiles, But, once delivered, kills them with a frown. He therefore, timely warned, himself supplies Her want of care, screening and keeping warm The plenteous bloom, that no rough blast may sweep His garlands from the boughs. Again, as oft As the sun peeps and vernal airs breathe mild, The fence withdrawn, he gives them ev'ry beam, And spreads his hopes ...
— The Task and Other Poems • William Cowper

... weeklies—these illustrations being arranged with a nice eye to convenience, right side up, the small-sized pictures low down, the larger ones higher. There was a fireplace which, it being summertime, had a screening brown-paper skirt that fell to the hearth. Above this, along the mantel, was another skirt, made of a newspaper, short and pouty, and scissored at the lower edge into an elaborate saw-tooth design. The mantel was further adorned by certain assorted belongings ...
— The Plow-Woman • Eleanor Gates

... arrangements are made for their education by special sight-seeing trains, by appreciative guides, and by courses of lectures. The Canal staff is also housed by the State—in wooden structures, built upon piles, and protected by mosquito-proof wire screening. The accommodation for bachelors is somewhat meager; but married couples are treated very liberally, and their quarters are brightened by pretty little gardens. The rates of pay are high, and there are numerous concessions which to one of Indian experience appear exceedingly generous. ...
— The Great Events by Famous Historians, Vol. 21 - The Recent Days (1910-1914) • Charles F. Horne, Editor

... astounding. Signs of a great convulsion revealed themselves in his face. His lips were parted and drawn as if in pain; his eyes were half closed, screening the emotion that groped behind the lids. It was the face, the figure of a man mightily shaken by an unexpected emotion. Slowly his eyes were opened. An expression of utter despair and longing had come into them. Mrs. Braddock was staring at her husband as if she could ...
— The Rose in the Ring • George Barr McCutcheon

... Instead of screening himself by the boat's side, Nic seized two oars, got them over the rowlocks, and as soon as they were in the river he began to pull with all his might, watching the figure of Saunders limping slowly down after them and stopping from time to time for a shot; Samson ...
— Nic Revel - A White Slave's Adventures in Alligator Land • George Manville Fenn


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