Related Clues:

• Fogbow's shape
• Trajectory
• Circle bit
• Curve
• Pigskin path
• The 'r' of 'pi r squared'
• Bowlike line
• Fly ball's path
• Rainbow, e.g.
• Curvature
• Semi-circle
• Bow part
• Projectile path
• Bowlike curve
• Jump a gap, as electricity