1. radar echo an electronic signal that has been reflected back to the radar antenna; contains information about the location and distance of the reflecting object
  2. road rage violence exhibited by drivers in traffic
  3. redirect channel into a new direction
  4. radicchio prized variety of chicory having globose heads of red leaves
  5. radar measuring instrument using pulses of microwave radiation
  6. retrench tighten one's belt; use resources carefully
  7. red beech North American forest tree with light green leaves and edible nuts
  8. red birch birch of swamps and river bottoms throughout the eastern United States having reddish-brown bark
  9. radar beacon a device that, on receiving radar signals, transmits coded signals in response to help navigators determine their position
  10. paradigm a standard or typical example
  11. retract formally reject or disavow
  12. paradox a statement that contradicts itself
  13. starch a complex carbohydrate in seeds, fruits, and pith of plants
  14. autarchy a political system governed by a single individual
  15. readership the audience reached by written communications
  16. diarchy a form of government having two joint rulers
  17. starchy consisting of or containing starch
  18. radish a cruciferous plant of the genus Raphanus having a pungent edible root
  19. dyarchy a form of government having two joint rulers
  20. round arch an arch formed in a continuous curve