Tracer may refer to:
Science Flow tracer, any fluid property used to track fluid motion Fluorescent tracer, a substance such as 2-NBDG containing a fluorophore that is used for tracking purposes Histochemical tracer, 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, a substance containing a radioisotope that is used for tracking purposes TRACER (cosmic ray detector) (Transition Radiation Array for Cosmic Energetic Radiation), a balloon-borne cosmic ray detector Tracers, a colloquialism for visual trailing, often experienced in connection with drug use TRACERS (Tandem Reconnection and Cusp Electrodynamics Reconnaissance Satellites), a pair of orbiters to study the solar wind
Military Tracers, tracer ammunition, special bullets that burn brightly to enable the shooter to follow the bullets' trajectories Tactical reconnaissance and counter-concealment-enabled radar (TRACER), a radar system developed by the United States Army Grumman E-1 Tracer, a carrier-borne early warning aircraft used by the United States Navy in the 1960s Tactical Reconnaissance Armoured Combat Equipment Requirement, a joint British–American scout vehicle
Arts and entertainment Music Tracer (band), an Australian rock band Tracer (album), a 2012 album by Teengirl Fantasy "Tracers", song by Ash (band) from A-Z, Vol.1 2010 "Tracers", song by Miracle Fortress from Was I the Wave? 2011 "Tracers", song by Trans-Siberian Orchestra from Night Castle 2009
Films Tracer (film), a 2016 Vietnamese film Tracers (film), a 2015 American film
Video games Tracer (video game), a 1995 action-puzzle video game Tracer, a 1976 Sega arcade video game Tracer, leader of the Eliminators in The Warriors Tracer (Overwatch), a player character from the video games Overwatch and Heroes of the Storm Tracer Tong, a character from the video game series Deus Ex
Comics and comic strips Tracer (DC Comics), a DC Comics character Tracer (Marvel Comics), a Marvel Comics supervillain Tracer Bullet, one of Calvin's alter egos in Calvin and Hobbes
Television Tracer (TV series), a 2022 South Korean television series
Transportation Mercury Tracer, an automobile Tracer (bus), the bus system for Tracy, California Yamaha Tracer 900 Yamaha Tracer 700 MonoTracer Zerotracer E-Tracer and X-Tracer by Peraves
See also
Trace (disambiguation) Tracing (disambiguation) Tracer Bullet (disambiguation) Traceur, a parkour practitioner