catflap.org Online Dictionary Query

  derailing railcar /dɪɹˈeɪlɪŋ ɹˈeɪlkɑː/
   [Am.] Versuchswagen zur Untersuchung der Entgleisungssicherheit / von Entgleisungsphänomenen
     Synonym: derailing wagon
  
   see: railway carriage, carriage, railway coach, coach, railroad car, railcar, car, railway carriages, carriages, railway coaches, coaches, railroad cars, railcars, cars, compartment coach, compartment car, flanger wagon, flanger car, flanger, instruction wagon, instruction railcar, exhibition coach, exhibition car, suburban carriage, suburban coach, suburban car, end coach, rear coach, end car, rear car, lowmac coach, dynamometer coach, dynamometer car, lighten a wagon