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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



... one in window leaning, Hark how the city bells their peals prolong! See how the dust the verdant turf is screening, Where the calashes and the wagons throng! Hand from the window—he's drowsy, the speaker, In my saddle I nod, cousin mine— Primo a crust, and secundo a beaker, Hochlaender wine! Isn't it heavenly—the fish-market? So? "Heavenly, oh heavenly!" ...
— Library Of The World's Best Literature, Ancient And Modern, Vol 4 • Charles Dudley Warner

... revolving over the details, is they had been related to him. That Arthur was the culprit, his judgment utterly repudiated; and he came to the conclusion that he must be screening another. He glanced at Mrs. Channing, who ...
— The Channings • Mrs. Henry Wood

... busy since daybreak spurring up and down the plateau of Illy. The cavalrymen had been awakened at peep of dawn, man by man, without sound of trumpet, and to make their morning coffee had devised the ingenious expedient of screening their fires with a greatcoat so as not to attract the attention of the enemy. Then there came a period when they were left entirely to themselves, with nothing to occupy them; they seemed to be forgotten by their commanders. ...
— The Downfall • Emile Zola

... he doing, our new god Pan, Far from the reeds and the river? Spreading mischief and scattering ban, Screening 'neath "knickers" his shanks of a goat, And setting the wildest rumours afloat, To set ...
— Punch, Or The London Charivari, Vol. 103, Sep. 24, 1892 • Various

... Hamilton, and the West. Arrived at the colliery about half-past one o'clock, the visitors were received by Mr. Watson, and after a brief space spent in inspecting the three magnificent winding and fan engines, the Guibal fan, and the framework for screening the coal, they were conducted by Mr. James Gilchrist, manager, down into the workings in the ell seam at a depth of 118 fathoms. Here at the pit bottom, in the roads and at the face, twenty-one Swan lamps were burning, giving forth a brilliant, steady flame, ...
— Scientific American Suppl. No. 299 • Various


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