anchor ring

Noun
  1. A toroidal shape (synset 113898031)
    "a ring of ships in the harbor"; "a halo of smoke"
    is a type of: toroid - the doughnut-shaped object enclosed by a torus
    subtypes: fairy circle, fairy ring - a ring of fungi marking the periphery of the perennial underground growth of the mycelium
    same as: annulus, doughnut, halo, ring

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