A laser that operates by analogy with an electronic waterfall, with electrons cascading down a series of small steps emitting a photon at each step.

A device that emits a highly concentrated beam of light to highlight items of interest at some distance

(nautical) A simple type of dinghy

silphium resin

(physics) the process of using the force exerted by a laser to reduce the temperature of a gas, or the spread of velocities of a beam of atoms

plural of laser beam

The light emitted by a laser. / (baseball) A low, hard-hit or -thrown ball.

any laser that obtains its energy from a chemical reaction

plural of quantum cascade laser

a laser pointer