magnetron

n. two-element vacuum tube that produces vigorously energetic or forceful electromagnetic signals in microwave span of frequencies

A cavity magnetron is a high-powered vacuum tube that generates coherent microwaves. They are commonly found in microwave ovens, as well as various radar applications.
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Noun
1. a diode vacuum tube in which the flow of electrons from a central cathode to a cylindrical anode is controlled by crossed magnetic and electric fields; used mainly in microwave oscillators
(hypernym) tube, vacuum tube, thermionic vacuum tube, thermionic tube, electron tube, thermionic valve

n. magnetron

magnetron
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