noun
annulus
Annulus (noun) means a shape or object like a ring, with an open space in the middle.
noun
1
A shape or object like a ring, with an open space in the middle.
2
(anatomy) A ring of tough tissue, especially the one around a heart valve opening that its flaps and muscles attach to.
3
A bright ring of light around a dark body in the sky, as seen for example when the Moon passes in front of the Sun but does not fully cover it.
4
A part around a fern or moss spore case that shrinks and splits it open to release the spores.
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Etymology
A learned borrowing from Medieval Latin ānnulus, a misspelling of Latin ānulus (“ring, especially one worn on a finger”), from ānus (“ring”) — possibly from Proto-Indo-European *h₁eh₂-n-o- (“ring”), from an uncertain root — and -ulus (diminutive suffix). The plural annuli is likewise a learned borrowing, from Medieval Latin ānnulī.
Synonyms
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Rhymes for annulus
See all rhymes for annulus →Frequently asked questions
What is the meaning of annulus?
"annulus" (noun) means a shape or object like a ring, with an open space in the middle.
What is another word for annulus?
Other words for "annulus" include ring, doughnut, skirt, halo.
What are the different meanings of annulus?
"annulus" has 3 main meanings: 1. A shape or object like a ring, with an open space in the middle; 2. (anatomy) A ring of tough tissue, especially the one around a heart valve opening that its flaps and muscles attach to; 3. A bright ring of light around a dark body in the sky, as seen for example when the Moon passes in front of the Sun but does not fully cover it.
