Meaning of annulus | Babel Free
[ˈaːn.nʊ.ɫʊs]Definitions
A ring- or donut-shaped area, object, or structure.
CEFR level
B1
Intermediate
This word is part of the CEFR B1 vocabulary — intermediate level.
This word is part of the CEFR B1 vocabulary — intermediate level.
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