annulus
1. a toroidal shape - a ring of ships in the harbor - a halo of smoke • Syn: ring, halo, doughnut, anchor ring • Hypernyms: toroid • Hyponyms: fairy ring, fairy circle 2. (Fungi) a remnant of the partial veil that in mature mushrooms surrounds the stem like a collar • Syn: skirt • Topics: Fungi, kingdom Fungi, fungus kingdom • Hypernyms: plant part, plant structure • Part Holonyms: partial veil
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