1. pretentious creating an appearance of importance or distinction
  2. ordered series an ordered reference standard
  3. partner in crime someone who assists in a plot
  4. arthrodesis the surgical fixation of a joint which is intended to result in bone fusion
  5. parthenogenesis process in which an unfertilized egg develops
  6. portentous of momentous or ominous significance
  7. lanthanide series the rare-earth elements with atomic numbers 57 through 71
  8. bartender an employee who mixes and serves alcoholic drinks at a bar
  9. Parthenocissus woody vines having disklike tips on the tendrils
  10. dinner dress a gown for evening wear
  11. partnership a cooperative relationship between people or groups
  12. Painted Desert a desert on a high plateau in northeastern Arizona
  13. brontosaurus huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic
  14. actinide series (chemistry) a series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium
  15. partner relation the responsibility of partners to act in one another's best interests
  16. Gartner's bacillus a form of salmonella that causes gastroenteritis in humans
  17. pair of tweezers a hand tool for holding consisting of a compound lever for grasping
  18. Eastern Desert a desert in Egypt between the Nile River and the Red Sea
  19. portentously in a portentous manner
  20. partner off form a pair or pairs