#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

No statement uses or specializes #anchor_ring; click here to add one.