Related Clues:

• Something to turn on
• Trig calculation
• Circle line
• Bisecting line
• Cartesian plane divider
• Geometry term
• ''Evil'' Bush grouping
• "The ___ of Evil"
• Pivot line
• Heavy graph line
• Center of a rotation
• Italy's side, once
• Imaginary line about which the Earth turns
• Something to reflect on?
• Allies' opposition