1. primary source a firsthand document that provides information
  2. primary care the medical care received on first contact with the medical system (before being referred elsewhere)
  3. primary school a school for young children; usually the first 6 or 8 grades
  4. primary cell an electric cell that generates an electromotive force by an irreversible conversion of chemical to electrical energy; cannot be recharged
  5. primary censorship armed forces censorship performed by personnel of a military unit on the personal communications of persons assigned to that unit
  6. trimmer arch an arch built between trimmers in a floor
  7. primrose path a life of ease and pleasure
  8. product research marketing research that yields information about desired characteristics of the product or service
  9. primrose any of numerous short-stemmed plants of the genus Primula having tufted basal leaves and showy flowers clustered in umbels or heads
  10. primary feather one of the main flight feathers projecting along the outer edge of a bird's wing
  11. primary election a preliminary election where delegates or nominees are chosen
  12. precursor something indicating the approach of something or someone
  13. primary tooth one of the first temporary teeth of a young mammal
  14. 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
  15. poor man's orchid any plant of the genus Schizanthus having finely divided leaves and showy variegated flowers
  16. research a seeking for knowledge
  17. primary winding coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit
  18. primary sex character the genetically determined sex characteristics bound up with reproduction (genitals and organs of reproduction)
  19. empirical research an empirical search for knowledge
  20. primary amenorrhea delay of menarche beyond age 18