| Answer | Crossword Clue |
|---|---|
| ignitrons | IGNITRON, a mercury-arc rectifier |
| ignitron | a mercury-arc rectifier |
| ignitron | a mercury-containing rectifier tube in which the arc is struck again at the beginning of each cycle by a special electrode separately energized by an auxiliary circuit |
| ignitrons | A kind of rectifier with a mercury cathode, able to carry large electric currents |
