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US [ˈtreɪsər]
UK [ˈtreɪsə(r)]
  • n.曳光弹;示踪剂
  • Web追踪者;示踪物;示踪器
Plural Form:tracers  
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n.
1.
曳光弹a bullet or shell(= a kind of bomb) that leaves a line of smoke or flame behind it
2.
示踪剂a radioactive substance that can be seen in the human body and is used to find out what is happening inside the body

Sample Sentence

Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard