(technology) A type of electric lamp for producing a beam of light in which the filament is sealed inside a unit consisting of the reflector and lens so as to ensure the alignment of the beam and to protect the reflector from becoming dirty or tarnished.

plural of traffic beam

plural of country beam

(automotive, dated) A headlight setting intended for roads with traffic on them at night.

(physics) A beam of atoms, ions or subatomic particles that has been accelerated by some device and collimated by magnets and/or electrostatic lenses

plural of balance beam

(physics) A beam of beta particles, electron neutrinos or of radioactive ions

plural of dragon beam

A type of jetty that runs diagonally from one corner to another and supports the corner posts above, while being supported by corner posts below.

A horizontal truss joining the queen posts in rafters.