1. armature coil in which voltage is induced by motion through a magnetic field
  2. variometer a measuring instrument for measuring variations in a magnetic field
  3. dura mater the outermost (and toughest) of the 3 meninges
  4. parameter a constant in the equation of a curve that can be varied
  5. firewater any strong spirits (such as strong whisky or rum)
  6. barometer an instrument that measures atmospheric pressure
  7. worm-eaten infested with or damaged (as if eaten) by worms
  8. jerkwater small and remote and insignificant
  9. warranter one who provides a warrant or guarantee to another
  10. water meter meter for measuring the quantity of water passing through a particular outlet
  11. foremother a woman ancestor
  12. warmer device that heats water or supplies warmth to a room
  13. fresh water water that is not salty
  14. warm to become excited about
  15. gray matter greyish nervous tissue containing cell bodies as well as fibers; forms the cerebral cortex consisting of unmyelinated neurons
  16. hard water water that contains mineral salts (as calcium and magnesium ions) that limit the formation of lather with soap
  17. freshwater water that is not salty
  18. perimeter a line enclosing a plane area
  19. firmware (computer science) coded instructions that are stored permanently in read-only memory
  20. world war a war in which the major nations of the world are involved