(automotive, dated) A headlight setting intended for quiet country roads at night.

(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

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

plural of balance beam

A horizontal truss joining the queen posts in rafters.

plural of beam splitter

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.

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