1. uneven parallel bars a pair of parallel bars set at different heights
  2. parallel bars gymnastic apparatus consisting of two parallel wooden rods supported on uprights
  3. uneven bars a pair of parallel bars set at different heights
  4. unparalleled radically distinctive and without equal
  5. paradox a statement that contradicts itself
  6. unparallel not straight or parallel
  7. parallel-park park directly behind another vehicle
  8. nonparallel (of e.g. lines or paths) not parallel; converging
  9. parallel port an interface between a computer and a printer where the computer sends multiple bits of information to the printer simultaneously
  10. antiparallel (especially of vectors) parallel but oppositely directed
  11. nevertheless despite anything to the contrary
  12. annual parallax the parallax of a celestial body using two points in the earth's orbit around the sun as the baseline
  13. parallelogram a quadrilateral whose opposite sides are parallel and equal
  14. Central Powers in World War I the alliance of Germany and Austria-Hungary and other nations allied with them in opposing the Allies
  15. venae palpebrales veins of the eyelids
  16. parallel being everywhere equidistant and not intersecting
  17. infant mortality rate the death rate during the first year of life
  18. eleven-plus (formerly in Britain) an examination taken by 11 and 12 year old students to select suitable candidates for grammar school
  19. John Barleycorn an alcoholic beverage that is distilled rather than fermented
  20. vena brachialis two veins in either arm that accompany the brachial artery and empty into the axillary vein