graser

Etymology
.

Noun

 * 1)  A device for the coherent amplification or generation of electromagnetic radiation in the gamma ray wavelength by the use of excitation energy in resonant atomic or molecular systems.
 * 2) The beam of coherent gamma rays produced by such a device.
 * 1) The beam of coherent gamma rays produced by such a device.
 * 1) The beam of coherent gamma rays produced by such a device.