1. subarachnoid space a space in the meninges beneath the arachnoid membrane and above the pia mater that contains the cerebrospinal fluid
  2. parking space a space where an automobile can be parked
  3. spic-and-span completely neat and clean
  4. subsequent following in time or order
  5. spick-and-span completely neat and clean
  6. Burgundy sauce reduced red wine with onions and parsley and thyme and butter
  7. breathing space sufficient room for easy breathing or movement
  8. storage space the area in any structure that provides space for storage
  9. cyberspace a worldwide network of computer networks
  10. pericardial space the space between the layers of the pericardium that contains fluid that lubricates the membrane surfaces and allows easy heart movement
  11. Sparganiaceae coextensive with the genus Sparganium
  12. Saturday night special a cheap handgun that is easily obtained
  13. frontispiece an illustration facing the title page of a book
  14. paracentesis centesis of the belly to remove fluid for diagnosis
  15. Spirochaetaceae large coarsely spiral bacteria
  16. predispose make susceptible
  17. spark advance the timing of ignition relative to the position of the piston in an internal-combustion engine
  18. break one's back work very hard, like a slave
  19. Progne subis large North American martin of which the male is blue-black
  20. hub-and-spoke a system of air transportation in which local airports offer air transportation to a central airport where long-distance flights are available