Answer: TOROID

Possible questions:


Doughnut-shaped we know 3 Answers
Doughnut shape we know 2 Answers
Donut-shaped we know 2 Answers
Ring-shaped surface we know 1 Answer
Doughnut-shaped object we know 1 Answer
Donut, mathematically we know 1 Answer
Donut-shaped tube we know 1 Answer
Circular tube we know 1 Answer

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