Any device that is capable of emitting a very intense, narrow, parallel beam of highly monochromatic and coherent light (or other electromagnetic…

a laser in which a ruby crystal is the working medium, generating pulses of red light.

(a) (now rare) = main sense above; (b) originally Science Fiction, a weapon incorporating a laser; a toy intended to resemble this; (c) any of…

a laser in which radiation is produced in a suitably shaped semiconductor crystal by the recombination of electrons and holes at a p–n junction as a…

Science Fiction. A weapon producing destructive laser or similar beams (of variable phase); spec. a (usually hand-held) device whose output can be…

a tunable laser based on the intense fluorescence of certain organic dyes.

a laser in which an excimer is used as the excited state for stimulated emission.

(a) a small, slender hand-held device emitting a laser beam, used for scanning bar-codes; (b) a hand-held device emitting a narrow beam of coloured…