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 structure the parts of a plant involved in its reproduction
  4. reproductive memory recall that is hypothesized to work by storing the original stimulus input and reproducing it during recall
  5. reproductive producing new life or offspring
  6. reproduction cost cost of reproducing physical property minus various allowances (especially depreciation)
  7. productivity the quality of yielding positive results
  8. operating system (computer science) software that controls the execution of computer programs and may provide various services
  9. productiveness the quality of being productive or having the power to produce
  10. recording system audio system for recoding sound
  11. digestive system the system that makes food absorbable into the body
  12. reproductive cloning making a full living copy of an organism
  13. radioactive waste useless radioactive materials that are left after some laboratory or commercial process is completed
  14. 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
  15. respiratory system the system for taking in oxygen and giving off carbon dioxide; in terrestrial animals this is accomplished by breathing
  16. prosodic system the system of accentuation used in a particular language
  17. endocrine system the system of glands that produce endocrine secretions that help to control bodily metabolic activity
  18. coordinate system a system that uses coordinates to establish position
  19. reductivism an art movement in sculpture and painting that began in the 1950s and emphasized extreme simplification of form and color
  20. political system the members of a social organization who are in power