- noun a narrow, focused stream of electrons moving at high speed in the same direction, often in a vacuum
- A narrow stream of electrons traveling in the same direction, with approximately the same speed, and emitted from the same source. electric and/or magnetic fields are utilized to influence such a beam. electron beams are used, for example, in CRTs, klystrons, lasers, and for machining or drilling. Its abbreviation is E beam.
- abbreviationE beam
- noun part of a television’s internal display mechanism, which fires charged particles over a light-responsive screen to create a picture