1. Proto-Norse the Germanic language of Scandinavia up until about 700
  2. proteinase any enzyme that catalyzes the splitting of proteins into smaller peptide fractions and amino acids by a process known as proteolysis
  3. proteinaceous relating to or of the nature of protein
  4. proteinuria the presence of excessive protein in the urine
  5. preteenager a preadolescent boy or girl
  6. pretentious creating an appearance of importance or distinction
  7. bulletin board a board that hangs on a wall; displays announcements
  8. portentous of momentous or ominous significance
  9. Pretender a claimant to the throne or to the office of ruler
  10. pretender a person who makes deceitful pretenses
  11. rotten borough an English parliamentary constituency with few electors
  12. protanopia dichromacy characterized by lowered sensitivity to long wavelengths of light resulting in an inability to distinguish red and purplish blue
  13. protanopic inability to see the color red or to distinguish red and bluish-green
  14. boarding pass a pass that allows you to board a ship or plane
  15. uneven bars a pair of parallel bars set at different heights
  16. Brandenburg the territory of an Elector (of the Holy Roman Empire) that expanded to become the kingdom of Prussia in 1701
  17. garden party a party of people assembled for social interaction out of doors
  18. protein an organic compound essential to living cells
  19. pertinacious stubbornly unyielding
  20. pontoon bridge a temporary bridge built over a series of pontoons

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