Related Clues:

• Columbus, for one: Abbr.
• Geometric fig.
• Approx.
• Equator, e.g.: Abbr.
• Street sign abbr.
• Geom. figure
• Alternative to Pl. or Ct.
• Rnd. fig.
• Round fig.
• Short round?
• Fig. with a diameter
• Abbr. on a residential street sign
• Diam. x pi
• Dist. around
• Part of a cul-de-sac address, maybe: Abbr.