Laser

Origin acronym coined from Light Amplification by Stimulated Emission of Radiation
 * 1) (noun) a device that concentrates high energies into an intense narrow beam of nondivergent monochromatic electromagnetic radiation
 * 2) (verb) to treat a structure with a laser beam.

Description
Lasers can be based on numerous chemical sources, gas, liquid, and solid. Lasers are nowadays ubiquitous in everyday devices, including optical-disc players and printers, have a key role in research in fluorescence applications, such as flow cytometry or confocal microscopy, and are of medical importance by their application in microsurgery, cauterization, and for a variety of diagnostic purposes.