1. reproductive system organs and tissues involved in the production and maturation of gametes and in their union and subsequent development as offspring
  2. reproductive cell a spermatozoon or an ovum
  3. reproductive memory recall that is hypothesized to work by storing the original stimulus input and reproducing it during recall
  4. reproductive structure the parts of a plant involved in its reproduction
  5. reproductive cloning making a full living copy of an organism
  6. reproductive producing new life or offspring
  7. reproduction cost cost of reproducing physical property minus various allowances (especially depreciation)
  8. productiveness the quality of being productive or having the power to produce
  9. productivity the quality of yielding positive results
  10. operating system (computer science) software that controls the execution of computer programs and may provide various services
  11. digestive system the system that makes food absorbable into the body
  12. recording system audio system for recoding sound
  13. radioactive waste useless radioactive materials that are left after some laboratory or commercial process is completed
  14. respiratory system the system for taking in oxygen and giving off carbon dioxide; in terrestrial animals this is accomplished by breathing
  15. hypertext system a database management system that allows strings of text (`objects') to be processed as a complex network of nodes that are linked together in an arbitrary way
  16. protectiveness a feeling of protective affection
  17. unproductiveness the quality of lacking the power to produce
  18. prosodic system the system of accentuation used in a particular language
  19. endocrine system the system of glands that produce endocrine secretions that help to control bodily metabolic activity
  20. mercantile system an economic system (Europe in 18th century) to increase a nation's wealth by government regulation of all of the nation's commercial interests