tracer

A noun with multiple meanings: an investigator who locates missing persons or goods; an instrument for making tracings; a radioactive isotope used in medical imaging; or ammunition with a visible smoke trail.

• 🇪🇸Sustantivo con varios significados: persona que rastrea o busca a personas o mercancías desaparecidas; instrumento para copiar dibujos o planos; isótopo radiactivo usado en diagnóstico por imagen médica; o munición que deja una estela visible de humo.

1. Investigator of missing persons or goods B2 formal

   A person employed to locate missing individuals or lost items.

   • The company hired a tracer to find the missing shipment.
   • A tracer was assigned to locate the lost documents.
   • The police tracer successfully found the missing child.

   🇪🇸Investigador de personas o bienes desaparecidos

   Sinónimos: finderlocatorsearchertracker

2. Instrument for tracing B2 formal

   A tool or device used to create a copy or outline of something.

   • The artist used a tracer to copy the design onto the canvas.
   • An optical tracer helps in reproducing complex drawings.
   • The engineer employed a tracer to map the circuit layout.

   🇪🇸instrumento para trazar

3. Radioactive isotope for medical imaging C1 formal medical

   A radioactive substance introduced into the body to track biological processes or diagnose conditions.

   • The doctor injected a tracer to examine the patient's kidney function.
   • Radioactive tracers are used in PET scans to detect cancer.
   • The tracer revealed how the drug was metabolized in the body.

   🇪🇸Trazador radiactivo

   Sinónimos: radiopharmaceutical

4. Ammunition with visible trail C1 formal

   A type of bullet or projectile that leaves a visible smoke or light trail during flight for observation.

   • The soldiers used tracer rounds to adjust their aim at night.
   • Tracer ammunition helps in tracking the path of fire.
   • The gunfire left bright tracer streaks across the sky.

   🇪🇸Munición trazadora

   Sinónimos: tracer bullet

• tracers plural form
• tracers' possessive plural form
• tracer's possessive singular form