1. prussic acid a solution of hydrogen cyanide in water
  2. prescribed set down as a rule or guide
  3. preexist exist beforehand or prior to a certain point in time
  4. prescript prescribed guide for conduct or action
  5. proscribed excluded from use or mention
  6. prosodic system the system of accentuation used in a particular language
  7. prescient perceiving the significance of events before they occur
  8. press agent someone employed to arrange publicity
  9. Brassica hirta Eurasian mustard cultivated for its pungent seeds
  10. Pereskia aculeata West Indian woody climber with spiny stems and numerous fragrant white flowers in panicles followed by small yellow to orange fruits
  11. prestigious having an excellent reputation; respected
  12. prosaicness commonplaceness as a consequence of being humdrum and not exciting
  13. boracic acid any of various acids containing boron and oxygen
  14. pricing system a system for setting prices on goods or services
  15. Prescott a town in central Arizona
  16. prescribe issue commands or orders for
  17. prescriptive pertaining to giving directives or rules
  18. presence current existence
  19. present happening or existing now
  20. res gestae things done