An archaic name for the torus.
Anchor Ring
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References
Eisenhart, L. P. A Treatise on the Differential Geometry of Curves and Surfaces. New York: Dover, p. 314, 1960.Stacey, F. D. Physics of the Earth, 2nd ed. New York: Wiley, p. 239, 1977.Whittaker, E. T. A Treatise on the Analytical Dynamics of Particles & Rigid Bodies, 4th ed. Cambridge, England: Cambridge University Press, p. 21, 1959.Referenced on Wolfram|Alpha
Anchor RingCite this as:
Weisstein, Eric W. "Anchor Ring." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/AnchorRing.html