Tracer

• Histochemical tracer
  Histochemical tracer
  A histochemical tracer is a compound used to reveal the location of cells and track neuronal projections. A neuronal tracer may be retrograde, anterograde, or work in both directions...
  
  , a substance used for tracing purposes in histochemistry, the study of the composition of cells and tissues
• Isotopic tracer, a substance with an isotope that has been enriched to a greater level than that found in nature
• Radioactive tracer
  Radioactive tracer
  A radioactive tracer, also called a radioactive label, is a substance containing a radioisotope. Tracers can be used to measure the speed of chemical processes and to track the movement of a substance through a natural system such as a cell or a tissue...
  
  , a substance containing a radioisotope that is used for tracking purposes
• Flow tracer
  Flow tracer
  thumb|right|300px|On May 2, [[2001]], the Moderate-resolution Imaging Spectroradiometer obtained this spectacular image of the [[Atlantic Ocean]]'s [[Gulf Stream]]. The [[false color]]s in the image represent "[[brightness temperature]]" observed at the top of the [[atmosphere]]...
  
  , any fluid property used to track fluid motion:
  • Dye tracer
  • In the ocean
    Ocean
    An ocean is a large body of saline water, and a principal component of the hydrosphere. Approximately 75% of the Earth's surface is covered by ocean, a continuous body of water that is customarily divided into several principal oceans and smaller seas.More than half of this area is over 3,000...
    
    , salinity
    Salinity
    Salinity is the saltiness or dissolved salt content of a body of water. It is a general term used to describe the levels of different salts such as sodium chloride, magnesium and calcium sulfates, and bicarbonates...
    
    , potential temperature
    Potential temperature
    The potential temperature of a parcel of fluid at pressure is the temperature that the parcel would acquire if adiabatically brought to a standard reference pressure , usually 1000 millibars...
    
    , and the concentration of many different chemical compounds
• Tracer ammunition
  Tracer ammunition
  Tracer ammunition are special bullets that are modified to accept a small pyrotechnic charge in their base. Ignited upon firing, the composition burns very brightly, making the projectile visible to the naked eye...
  
  , special bullets that burn brightly to enable the shooter to follow the bullets' trajectories
• Mercury Tracer
  Mercury Tracer
  The Mercury Tracer is a compact car that was sold by the Mercury division of Ford Motor Company. It was based on the platform of the Mazda 323, replacing the European-derived Mercury Lynx. It is the Mercury version of the Ford Escort.-1987-1989:...
  
  , an automobile
• Tracer (DC Comics), a DC Comics
  DC Comics
  DC Comics is one of the largest and most popular American comic book and related media companies, along with Marvel Comics. It is the publishing division of DC Entertainment Inc., a subsidiary company of Warner Bros. Entertainment...
  
   character
• Tracer (Marvel Comics)
  Tracer (Marvel Comics)
  Tracer is a fictional character, a supervillain in the Marvel Comics Universe, in which he is an enemy of Spider-Man. His first appearance was in Friendly Neighborhood Spider-Man #1.-Fictional character biography:...
  
  , a Marvel Comics
  Marvel Comics
  Marvel Publishing, Inc., a company doing business as Marvel Comics, produces American comic books and related media. It forms a subsidiary of Marvel Entertainment, Inc....
  
   supervillain
• TRACER (magazine), a music magazine based out of Cincinnati, Ohio.
• TRACERS, a stage show about American involvement in the Vietnam War.
• TRACER (cosmic ray detector)
  TRACER (cosmic ray detector)
  Transition Radiation Array for Cosmic Energetic Radiation is a balloon flown cosmic ray detector built and designed at the University of Chicago. The detector is designed to measure the energy spectra of cosmic ray nuclei with atomic numbers between five and twenty-six ....
  
  , Transition Radiation Array for Cosmic Energetic Radiation is a balloon borne cosmic ray detector.
• Tracer (Transformers), a fictional character.

See also

• Trace
• Tracing
• Tracker
  Tracker (disambiguation)
  Tracker may refer to:* Tracking , a specialization in finding and following a trail.* Tracker, a person or possibly even a dog that is trained to track things, especially people...
  
  
• Tracer use in the oil industry
  Tracer use in the oil industry
  Tracers are used in the oil industry in order to qualitatively or quantitatively gauge how fluid flows through the reservoir, as well as being a useful tool for estimating residual oil saturation. Tracers can be used in either interwell tests or single well tests...
  
  
• Traser
  Self-powered lighting
  Tritium illumination is the use of gaseous tritium, a radioactive isotope of hydrogen, to create visible light. Tritium regularly emits electrons through beta decay, and when they interact with a phosphor material, fluorescent light is created...
  
  
• Traceur
  Parkour
  Parkour or l'art du déplacement is a physical discipline of French origin in which participants run along a route, attempting to negotiate obstacles in the most efficient way possible, as if moving in an emergency situation, using skills such as jumping and climbing, or the more specific parkour...