Enter a clue or pattern or both:

The Clue

Vacuum tube (6 letter answer)

The Answer

TRIODE

Tags


Notes

The answer TRIODE is seen occasionally, appearing about once every 850 puzzles.

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Vacuum tube with three elements

Definition

TRIODE as a noun:

1. a thermionic vacuum tube having three electrodes; fluctuations of the charge on the grid control the flow from cathode to anode which making amplification possible