Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun annulus

2 senses of annulus

Sense 1
ring, halo, annulus, doughnut, anchor ring -- (a toroidal shape; "a ring of ships in the harbor"; "a halo of smoke")
       => toroid -- (the doughnut-shaped object enclosed by a torus)

Sense 2
annulus, skirt -- ((Fungi) a remnant of the partial veil that in mature mushrooms surrounds the stem like a collar)
       => plant part, plant structure -- (any part of a plant or fungus)