magnetron
/ˈmaɡnɪtrɒn
/noun
An electron tube for amplifying or generating microwaves, with the flow of electrons controlled by an external magnetic field.You remember there had been developed in my laboratory by Randall and Boot, a cavity magnetron which made microwave radar possible and I went to America in connection with the early days of this....
- Randall had set up the unit on the basis of his wartime reputation, having developed (with Henry Boot) the cavity magnetron, the heart of airborne radar and a crucial element in the Allies' narrow victory in the battle of the Atlantic.
- Today, magnetrons are used as the source of heat in microwave ovens.
Origin
1920s: from magnetic + -tron from electron.
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