Circular

Circular may refer to:

• The shape of a circle
  • Circular reasoning, a type of logical fallacy
  • Circular reference
• Circular letter (disambiguation)
  • Flyer (pamphlet), a form of advertisement
• Circular Letter (Interlingua), an early Interlingua newsletter published from 1954 to 1965, when it was expanded and renamed Lingua e Vita
• Circular (album), the second studio album by Spanish singer Vega
• Circular (application), a buffer application for Twitter

https://en.wikipedia.org/wiki/Circular