1. number system any notation for the representation of numbers
  2. numeration system any notation for the representation of numbers
  3. sewer system facility consisting of a system of sewers for carrying off liquid and solid sewage
  4. water system a river and all of its tributaries
  5. power system a system of high tension cables by which electrical power is distributed throughout a region
  6. numbers game an illegal daily lottery
  7. solar system the sun with the celestial bodies that revolve around it
  8. immune system a system (including the thymus and bone marrow and lymphoid tissues) that protects the body from foreign substances and pathogenic organisms by producing the immune response
  9. ecosystem organisms interacting with their physical environment
  10. binary number system a positional system of numeration that uses binary digits and a radix of two
  11. merit system the system of employing and promoting civil servants on the basis of ability
  12. sensory system the body's system of sense organs
  13. computer system a system of one or more computers and associated software with common storage
  14. stereo system reproducer in which two microphones feed two or more loudspeakers to give a three-dimensional effect to the sound
  15. honor system a system of conduct in which participants are trusted not to take unfair advantage of others
  16. limbic system a system of functionally related neural structures in the brain that are involved in emotional behavior
  17. jury system a legal system for determining the facts at issue in a law suit
  18. meristem undifferentiated tissue from which new cells are formed, as at the tip of a stem or root
  19. monetary system anything that is generally accepted as a standard of value and a measure of wealth in a particular country or region
  20. cumbersome difficult to handle or use because of size or weight

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