Laser (noun)

A device that generates an intense beam of coherent light of a single color.

Origin:

An acronym of light amplification by stimulated emission of radiation.

Examples:

1. A laser was used to engrave the serial number on the watch.
2. The laser pointers were used to highlight various points in the presentation.
3. The laser cutter was used to make intricate designs in the metal.
4. The laser treatment removed the mole from her skin.
5. The laser show was a spectacular display of lights and colors.