tracer

• Every third bullet was a tracer--he had put in a tracer-charged drum before darkness. —  007 - The Lost Oasis
• Bursts of yellow tracer from the German machine guns pursued the fleeing gun crews. —  Panzer Aces
• Every fiftieth bullet was a tracer, and the little weapon loosened slugs faster than most military machine guns The pilot of the black plane saw the tracer. —  076 - The Flaming Falcons
• The tracer was absorbed at the neuron soma or cell body and bound to transporter molecules that carried it to the axon terminals in other structures. —  News from The Scientist
• The system localizes and tracks the RealEyeable ™ tracer, an implanted trackable fiducial ... —  Medgadget

Allen's Synonyms and Antonyms

Used in the Same Context