QUARK
Set to 2 different clues across 2 published puzzles, most often “Modern physics particle” — The New York Times, Saturday, 17 September 1994.
5 letters
Every clue on record, most used first
- Modern physics particleonce
The New York Times — Saturday, 17 September 1994
- Physics particleonce
The New York Times — Thursday, 11 August 1994