POSITRON
Set to 2 different clues across 2 published puzzles, most often “Beta decay emission, sometimes” — The New York Times, Friday, 18 January 2008.
8 letters
Every clue on record, most used first
- Beta decay emission, sometimesonce
The New York Times — Friday, 18 January 2008
- Physics particleonce
The New York Times — Wednesday, 31 August 1994