annulus

Từ điển Oxford Learners Wordfinder Dictionary

noun

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