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Tracer   /trˈeɪsər/   Listen
Tracer

noun
1.
An investigator who is employed to find missing persons or missing goods.
2.
An instrument used to make tracings.
3.
(radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes.
4.
Ammunition whose flight can be observed by a trail of smoke.  Synonym: tracer bullet.



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"Tracer" Quotes from Famous Books



... pieces of paper and had to be shifted on and off cylinders, would probably be as long as the ordinary graphical processes. Coradi's integraph works on an ordinary drawing board, but since there are nearly 10 inches between the guide point and tracer, the sum curve is thrown 10 inches behind the primitive in each integration. Thus a double summation requires say 26 inches of board, and it is impossible to integrate thrice without reproducing the primitive. The fact that the primitive ...
— Scientific American Supplement, No. 794, March 21, 1891 • Various

... at last unmans him, and brings about his catastrophe in his combat with Macduff. This is what I call ideal and imaginative representation, which marks the outlines and boundaries of character, not by arbitrary lines drawn at this angle or that, according to the whim of the tracer, but by those mountain-ranges of human nature which divide man from man and temperament from temperament. And as the imagination of the reader must reinforce that of the poet, reducing the generic again to the specific, and defining it into sharper individuality by a comparison with the experiences ...
— The Function Of The Poet And Other Essays • James Russell Lowell

... les belles betes, Creuser profond et tracer droit, Bravant la pluie et les tempetes, Qu'il fasse chaud, qu'il fasse froid? Lorsque je fais halte pour boire, Un brouillard sort de leurs naseaux, Et je vois sur leur corne noire Se poser les petits oiseaux. S'il ...
— French Lyrics • Arthur Graves Canfield

... de fatigue par la vie que nous venons de mener depuis dix jours! ecrira un peu plus tard a votre Majeste. Tout ce qu'elle a pu faire, est de tracer quelques mots pour notre bien aimee Louise que je recommande a votre bonte. On me presse encore, Madame, je ne puis que me souscrire avec mon vieil attachement pour vous, de ...
— The Letters of Queen Victoria, Vol 2 (of 3), 1844-1853 • Queen Victoria

... said Mrs. Mimms, dialing the super's apartment again to check. "Hooking these up to a regular aerial is so much easier." The superintendent's set luckily had an outside antenna and by manipulating certain dials, the Destinyworker traced it out and up to the roof. Pressing a button marked TRACER LIGHT, she left the set in operation and made her way up to the top floor of the apartment house. Taking the fire exit to the roof, Mrs. Mimms found herself among a forest of TV aerials. However there was a small circle of light cast about one of them and ...
— The Amazing Mrs. Mimms • David C. Knight

... the ones he had used hitherto, which were of local make. However, there had been exasperating and unexpected delays in their shipment. Magnus and Harran both had counted upon having the ploughs in their implement barns that very week, but a tracer sent after them had only resulted in locating them, still en route, somewhere between The Needles and Bakersfield. Now there was likelihood of rain within the week. Ploughing could be undertaken immediately afterward, so soon as the ground was softened, but there ...
— The Octopus • Frank Norris



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