beam weapon

noun

Definition of beam weapon 

: a weapon that uses a beam of energy or radiation (such as a laser beam) to inflict damage Despite this, inventors have envisioned giant superconducting storage rings that could provide huge amounts of power instantaneously for city power grids, or to power military beam weapons for use against ballistic missiles.— Malcolm W. Browne

First Known Use of beam weapon

1977, in the meaning defined above

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The first known use of beam weapon was in 1977

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