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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



... face. Still human sense remains. Where shall he turn? His royal palace seek,—or in the woods Secluded hide?—To tarry fear forbids, And shame prevents returning. While he doubts His hounds espy him. Quick-nos'd Tracer first, And Blackfoot give the signal by their yell: Tracer of Crete, and Blackfoot Spartan bred. Swifter than air the noisy pack rush on; Arcadian Quicksight; Glutton; Ranger, stout; Strong Killbuck; Whirlwind, furious; Hunter, fierce; Flyer, swift-footed; and quick-scented Snap: Ringwood, late ...
— The Metamorphoses of Publius Ovidus Naso in English blank verse Vols. I & II • Ovid

... to give us a king-sized headache! But they didn't have any trouble finding you. We discovered tonight that some kind of tracer material had been worked into all your clothes. Even the flimsies. Somebody may have been planted in the school laundry, but that's not important now." He looked at her for a moment. "What made you decide to take ...
— Legacy • James H Schmitz

... known that there was a leak!" he said with hoarse, painful deliberation. "I have sent out every possible tracer. I have followed up every sort of clew I have transferred a dozen men. I have ...
— The Last Shot • Frederick Palmer

... seven sectors perhaps a dozen vessels threw out enormous spherical screens of intense red light, and as they did so their tracer points upon all the interlocked lookout plates also became ringed about with red. Toward those crimson markers the pilots of the unmarked vessels directed their courses at their utmost power; and while the white lights upon the lookout plates moved slowly toward ...
— Triplanetary • Edward Elmer Smith



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