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   tracer

   /ˈtreɪsə/

   noun

   • 1. a person or thing that traces something or by which something may be traced.
   • ▪ a bullet or shell whose course is made visible in flight by a trail of flames or smoke, used to assist in aiming: "the night sky turned into a light show of artillery, flares, and tracers"
   • ▪ a substance introduced into a biological organism or other system so that its subsequent distribution may be readily followed from its colour, radioactivity, or other distinctive property: "they used radioactive carbon as a tracer"
   • ▪ a device which transmits a signal and so can be located when attached to a moving vehicle or other object.

   Scrabble Points: 8

   • T

     1

   • R

     1

   • A

     1

   • C

     3

   • E

     1

   • R

     1

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