BARIUM
Set to 3 different clues across 3 published puzzles, most often “Element that quickly oxidizes in air” — The New York Times, Sunday, 24 September 2006.
6 letters
Every clue on record, most used first
- Element that quickly oxidizes in aironce
The New York Times — Sunday, 24 September 2006
- Whitish metalonce
The New York Times — Friday, 16 November 2001
- Metal in witheriteonce
The New York Times — Sunday, 14 October 2001