Related Clues:

• Not a perfect circle
• Lionel train path, often
• Like most orbital paths
• Racetrack path
• Common Lionel layout
• Like a zero
• Sort of round
• Track configuration
• Miler's loop
• Typical track
• Track path
• Eyeglass lens shape
• Tot's circle, perhaps
• Like Obama's office
• Eyecup's shape