| Clue | Source | Date |
|---|---|---|
| Width of a cir | Wall Street Journal | 12 Dec 2020 |
| Line through the middle of a circle: Abbr | The Washington Post | 20 May 2019 |
| Line through the middle of a circle: Abbr | LA Times Daily | 20 May 2019 |
| Line through the middle of a circle: Abbr. | ||
| Circle meas | The Washington Post | 11 Feb 2017 |
| Rad. x 2 | Eugene Sheffer | 11 Feb 2015 |
| Spherical meas. | ||
| Circle measure: Abbr. | ||
| Circle meas. | ||
| Geom. figure | ||
| Geom. figure | ||
| Geometry meas. | ||
| Radius doubled (abbr.) | ||
| Circle meas. | ||
| Circle meas. | ||
| Twice the radius: Abbr. | ||
| Circle meas. | ||
| Twice the radius: Abbr. | ||
| Circular meas. | ||
| Geom. measure | ||
| Circle meas. | ||
| Circ. measure | ||
| Geom. measure | ||
| Geom. measure | ||
| Circum. ÷ pi | ||
| Circ. divider | ||
| Circum. ÷ pi | ||
| Line through the ctr. | ||
| Cir. bisector | ||
| Line through the ctr. | ||
| Cir. bisector | ||
| Cir. bisector | ||
| Geom. measure | ||
| Geom. line | ||
| Geom. datum | ||
| Circ. measure | ||
| Circle meas. | ||
| Circle stat. | ||
| Cir. divider | ||
| Circle meas. | ||
| Circ. measure | ||
| Cir. bisector | ||
| Cir. bisector | ||
| Rad. x 2 | ||
| Circle width: Abbr. | ||
| Measurement: Abbr. | ||
| Twice the radius: Abbr. | ||
| Circ. meas. |