#anchor_ring__ring__halo__annulus__annulu__anulus__doughnut  a toroidal shape; "a ring of ships in the harbor"; "a halo of smoke"
  supertype:  toroid  the doughnut-shaped object enclosed by a torus
  subtype:  fairy_ring__fairyring__fairy_circle__fairycircle  a ring of fungi marking the periphery of the perennial underground growth of the mycelium

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