rhumbatron
/ˈrʌmbətrɒn/(also rumbatron) Electronics. Now historical
noun
Each of two cavity resonators in a klystron, the first of which uses a high-frequency voltage to cause bunching of an electron beam, and the second of which uses this beam to induce a larger high-frequency voltage.
Origin
1930s; earliest use found in Science News. Irregularly from ancient Greek ῥύμβος, ῥόμβος whirling motion + -tron.
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