1. primordial having existed from the beginning
  2. prime meridian meridian from which east and west are reckoned
  3. primary winding coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit
  4. primordium an organ in its earliest stage of development
  5. trimmer arch an arch built between trimmers in a floor
  6. primer coat the first or preliminary coat of paint or size applied to a surface
  7. primitive characteristic of an earlier ancestral type
  8. primary feather one of the main flight feathers projecting along the outer edge of a bird's wing
  9. primary health care health care that is provided by a health care professional in the first contact of a patient with the health care system
  10. premarital relating to events before a marriage
  11. primary tooth one of the first temporary teeth of a young mammal
  12. prairie dog any of several rodents of North American prairies living in large complex burrows having a barking cry
  13. pulmonary artery one of two arteries (branches of the pulmonary trunk) that carry venous blood from the heart to the lungs
  14. primitive art a genre of art and outdoor constructions made by untrained artists who do not recognize themselves as artists
  15. prime quantity a number that has no factor but itself and 1
  16. prime time the hours between 7 and 11 p.m. when the largest tv audience is available
  17. pier mirror a large mirror between two windows
  18. primarily for the most part
  19. primigravida (obstetrics) a woman who is pregnant for the first time
  20. prime factor the prime factors of a quantity are all of the prime quantities that will exactly divide the given quantity