OZONE
Set to 36 different clues across 44 published puzzles, most often “Thunderstorm product” — The New York Times, Friday, 12 February 2010.
5 letters
Every clue on record, most used first
- Thunderstorm product3 times
The New York Times — Friday, 12 February 2010
- Kind of layer3 times
The New York Times — Tuesday, 7 October 1997
- O32 times
The New York Times — Thursday, 1 January 2009
- Gas in a layer2 times
The New York Times — Tuesday, 20 March 2007
- Earth protector2 times
The New York Times — Sunday, 11 February 2007
- Ultraviolet ray absorber2 times
The New York Times — Thursday, 19 September 1996
- Upper atmosphere layeronce
The New York Times — Tuesday, 19 April 2011
- Form of oxygen with a sharp odoronce
The New York Times — Tuesday, 10 November 2009
- Radiation reduceronce
The New York Times — Sunday, 19 July 2009
- Ultraviolet blockeronce
The New York Times — Sunday, 19 April 2009
- Gas with a penetrating odoronce
The New York Times — Friday, 19 December 2008
- A high flier may fly in itonce
The New York Times — Wednesday, 23 January 2008