Answer: toroid

AnswerCrossword Clue
TOROID

Doughnut, geometrically

TOROID

Ring-shaped

TOROID

Doughnut-shaped

TOROID
Tire tube, e.g.
TOROID
Bagellike
TOROIDDonut shape
TOROIDSolid like a bagel
TOROIDCurve parallel to an ellipse.
TOROIDGeometric surface.
TOROIDCircular tube
TOROIDDonut, mathematically
TOROIDDoughnut shape
TOROIDDonut-shaped tube
TOROIDBagel shape
TOROIDDoughnut-shaped object
TOROIDRing-shaped surface
TOROIDDonut-shaped