Filed from 16 published puzzles

NUCLEI

Set to 10 different clues across 16 published puzzles, most often “Centers” — The New York Times, Wednesday, 1 December 2010.

6 letters

Every clue on record, most used first

  • Centers3 times

    The New York Times — Wednesday, 1 December 2010

  • Cores3 times

    The New York Times — Saturday, 7 November 2009

  • Atomic centers2 times

    The New York Times — Wednesday, 3 November 2010

  • Cell centers2 times

    The New York Times — Monday, 15 October 2007

  • Central partsonce

    The New York Times — Sunday, 23 October 2005

  • Protons' placesonce

    The New York Times — Wednesday, 26 November 2003

  • Physics centersonce

    The New York Times — Wednesday, 21 November 2001

  • Core groups?once

    The New York Times — Sunday, 10 September 2000

  • Cell partsonce

    The New York Times — Monday, 31 January 2000

  • Centers of researchonce

    The New York Times — Saturday, 23 January 1999

Other answers to these clues