Historical clue formulations

• Geom. figure — 2022-11-04
• Street sign abbr. — 2015-11-01
• Geometry fig. — 2014-03-23
• Part of a cul-de-sac address, maybe: Abbr. — 2011-08-14
• Round fig. — 2010-12-06
• Diam. x pi — 2009-05-27
• Abbr. on a residential street sign — 2009-03-20
• Geometric fig. — 2009-02-22
• Geom. figure — 2008-02-03
• Geom. figure — 2007-04-15
• Alternative to Pl. or Ct. — 2004-05-21
• Geom. figure — 2004-04-02
• Geometric fig. — 2003-02-23
• Geometric fig. — 2002-10-15
• Street sign abbr. — 2001-12-08
• Geom. figure — 2000-08-07
• Equator, e.g.: Abbr. — 1999-05-14
• Columbus, for one: Abbr. — 1998-02-01
• Geom. figure — 1996-04-20
• Round: Abbr. — 1995-03-31
• Geom. figure — 1995-01-29