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Word of the Day Tuesday, June 9, 2026

annulus

/ænˈjuːləs/ noun · British & US
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What does annulus mean?

noun

A ring-shaped area of land or water, especially one that is partially surrounded by a larger area of land or water. In mathematics, a ring-shaped region in a circle or other curve.

Example

"The annulus of the lake was a popular spot for boating and fishing."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for annulus

Antonyms of annulus

Rhymes with annulus

Etymologically related