1. vacuum pump a pump that moves air in or out of something
  2. vacuum bomb a bomb that uses a fuel-air explosive
  3. vacuum tube electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
  4. vacuum chamber a chamber from which nearly all matter has been removed
  5. vacuum bag a bag into which dirt is sucked by a vacuum cleaner
  6. water pump the pump in the cooling system of an automobile that cause the water to circulate
  7. vacuum bottle flask with double walls separated by vacuum
  8. vacuum an empty area or space
  9. wampum small cylindrical beads made from polished shells and fashioned into strings or belts; used by certain Native American peoples as jewelry or currency
  10. gas pump a pump in a service station that draws gasoline from underground storage tanks
  11. wampumpeag small cylindrical beads made from polished shells and fashioned into strings or belts; used by certain Native American peoples as jewelry or currency
  12. cambium a formative one-cell layer of tissue between xylem and phloem in most vascular plants that is responsible for secondary growth
  13. vacuum gauge a gauge for indicating negative atmospheric pressure
  14. force pump pump used to force a liquid up and expel it under pressure
  15. vacuum gage a gauge for indicating negative atmospheric pressure
  16. goose bump erection of hairs of the skin in response to cold or stress
  17. psychopomp a conductor of souls to the afterworld
  18. suction pump a pump for raising fluids by suction
  19. bicycle pump a small pump that fills bicycle tires with air
  20. atom bomb a nuclear weapon in which enormous energy is released by nuclear fission (splitting the nuclei of a heavy element like uranium 235 or plutonium 239)