1. protagonist the principal character in a work of fiction
  2. perfect tense a tense of verbs used in describing action that has been completed (sometimes regarded as perfective aspect)
  3. perfect participle a participle that expresses completed action
  4. perfective tense a tense of verbs used in describing action that has been completed (sometimes regarded as perfective aspect)
  5. perfectibility the capability of becoming perfect
  6. parietal cortex that part of the cerebral cortex in either hemisphere of the brain lying below the crown of the head
  7. perfect gas a hypothetical gas with molecules of negligible size that exert no intermolecular forces
  8. superfluous more than is needed, desired, or required
  9. Perdix perdix common European partridge
  10. Pectinibranchia large order of gastropods comprising univalve mollusks that have a single gill resembling a comb
  11. perfectionist one displeased by anything that does not meet high standards
  12. perfunctory hasty and without attention to detail; not thorough
  13. protectorate a state or territory partly controlled by a stronger state
  14. perfect pitch the ability to identify the pitch of a tone
  15. perfect game a game in which a pitcher does not allow any opposing player to reach base
  16. perfectible capable of becoming or being made perfect
  17. perfecter a skilled worker who perfects something
  18. perfective aspect the aspect of a verb that expresses a completed action
  19. prefecture the district administered by a prefect
  20. vector product a vector that is the product of two other vectors