WordNet
n. a column of light (as from a beacon) [syn: beam, beam of light, ray, ray of light, shaft, shaft of light, irradiation]
Wikipedia
A light beam or beam of light is a directional projection of light energy radiating from a light source. Sunlight forms a light beam (a sunbeam) when filtered through media such as clouds, foliage, or windows. To artificially produce a light beam, a lamp and a parabolic reflector is used in many lighting devices such as spotlights, car headlights, PAR Cans and LED housings. Light from certain types of laser has the smallest possible beam divergence.
Usage examples of "light beam".
When I lifted the squeaking tailgate, the light beam fell on the now bloodstained bedsheet covering Aaron.
A light beam flashes across the screen, Earth's blue dot makes one circuit of the sun.
The whole thing lit up from inside, but that was nothing compared to the brilliance of the light beam that shone through the central core and down the long column of vaporized ice.
Cadderly and Ivan turned at the call, Cadderly's light beam showing the source of Pikel's dismay.
An overhead light beam excited a burst of radiant fire in an eye-dazzling display of the stone's violet-rose color.
It was then he noticed an object dimly outlined in the farthest reach of the light beam.
In a single motion, he cocked it, fitted the bolt, and spun about, using his light beam to show him the target.
A green light beam shot out at Finder's dagger from one of Xaran's eyestalks, but the blade split through the beam unscathed and buried itself in Xaran's central eye.
There just wasn't time to trek across country following the stone's light beam.