1. A toroidal shape
   - ring, halo, annulus, doughnut

Type of: toroid

• argillaceous rock
• argillite
• arginine
• Argiope
• Argiope aurantia
• Argiopidae
• Argive
• argle-bargle
• Argo
• argol
• argon
• argonaut
• Argonauta
• Argonauta argo
• Argonautidae
• Argonne
• Argonne Forest
• argonon
• Argos
• argosy
• argot
• arguable
• arguably
• argue
• arguer