1. polar star the brightest star in Ursa Minor
  2. bladder disorder a disorder of the urinary bladder
  3. bipolar disorder a mental disorder characterized by episodes of mania and depression
  4. pleurisy root erect perennial of eastern and southern United States having showy orange flowers
  5. Doppler radar radar that uses the Doppler shift to measure velocity
  6. close order a military formation for drill or marching
  7. blood disorder a disease or disorder of the blood
  8. polar circle a line of latitude at the north or south poles
  9. purchase order a commercial document used to request someone to supply something in return for payment and providing specifications and quantities
  10. prayer service a service at which people sing hymns and pray together
  11. blue racer bluish-green blacksnake found from Ohio to Texas
  12. potter's earth clay that does not contain any iron
  13. Pleurosorus small genus comprising terrestrial ferns
  14. brassard armor plate that protects the arm
  15. religious order a subdivision of a larger religious group
  16. Oliver Hazard Perry United States commodore who led the fleet that defeated the British on Lake Erie during the War of 1812; brother of Matthew Calbraith Perry (1785-1819)
  17. panic disorder an anxiety disorder characterized by unpredictable panic attacks; the attacks are usually severe but brief
  18. pleasure trip a journey taken for pleasure
  19. sleep disorder a disturbance of the normal sleep pattern
  20. capillary artery one of the small thin-walled arteries that end in capillaries