ma·ser 
(māzər)
(māzər)n.
1. A device that generates or amplifies electromagnetic radiation, especially microwaves, of a coherent wavelength by stimulated emission.
2. A natural object or region of space that acts like a maser, as a star-forming region of intersellar space.
[m(icrowave) a(mplification by) s(timulated) e(mission of) r(adiation).]
- water shield
- watershield
- waterside
- water ski
- waterski
- water-ski
- water-skier
- waterskin
- water snake
- waters of hydration
- water softener
- water-soluble
- water spaniel
- watersports
- waterspout
- water sprite
- water strider
- water supply
- water system
- water table
- water taxi
- waterthrush
- watertight
- water tower
- water turkey