SIGMA
Set to 13 different clues across 16 published puzzles, most often “Standard deviation symbol” — The New York Times, Saturday, 4 November 2006.
5 letters
Every clue on record, most used first
- Standard deviation symbol4 times
The New York Times — Saturday, 4 November 2006
- Summation signifier, in mathonce
The New York Times — Tuesday, 21 June 2011
- Symbol in a Riemann sumonce
The New York Times — Thursday, 19 November 2009
- Summation symbolonce
The New York Times — Tuesday, 29 September 2009
- Arithmetic series symbolonce
The New York Times — Sunday, 15 March 2009
- Calculus symbolonce
The New York Times — Tuesday, 6 December 2005
- ___ Society (super-high I.Q. group)once
The New York Times — Sunday, 18 August 2002
- Science society ___ Xionce
The New York Times — Wednesday, 24 July 2002
- Symbol of conductivityonce
The New York Times — Sunday, 30 September 2001
- Fraternity letteronce
The New York Times — Saturday, 2 December 2000
- ___ Alpha Epsilon fraternityonce
The New York Times — Tuesday, 15 June 1999
- Greek Sonce
The New York Times — Tuesday, 23 March 1999