Noun doughnut has 2 senses
  1. ring, halo, annulus, anulus, doughnut, anchor ring - a toroidal shape; "a ring of ships in the harbor"; "a halo of smoke"
    --1 is a kind of toroid
    --1 has particulars: fairy ring, fairy circle
  2. doughnut, donut, sinker - a small ring-shaped friedcake
    --2 is a kind of friedcake
    --2 has particulars: raised doughnut
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