A high-speed solid-state switching device which is triggered by a pulse of coherent light and is used in the triggers of nuclear devices.
- No special licenses had been granted by the U.S. for the export of krytrons in its possession.
- It returned the krytrons to the United States and claimed they were not intended for a nuclear use.
- It returned 469 of the krytrons but the rest, they declared, had been destroyed in testing conventional weapons.
Late 20th century: first element of obscure derivation + -tron.
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