noun · 11 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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Received-Pronunciation:/ˈænjʊləs/
General-American:/ˈænjələs/
US:Recorded audio is listed in the source snapshot.
Received-Pronunciation:/ˈænjʊlaɪ/
Received-Pronunciation:/-li/
General-American:/ˈænjəlaɪ/
General-American:/-li/
1
noun
Meaning 1
A ring- or donut-shaped area, object, or structure.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Narrower terms: torus
2
noun
Meaning 2
A ring of fibrous tissue; specifically (cardiology), such a ring around an opening of a heart valve, to which the valve leaflets and muscle fibres of the atria and ventricles are attached; an annulus fibrosus cordis.
Definition source: English Wiktionary via Wiktextract
Topics: anatomy, medicine, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
A ring of light in a celestial body, especially when caused by an annular eclipse (for example, when the Sun and Moon are in line with the Earth, but the Moon does not completely cover the Sun's disc).
Definition source: English Wiktionary via Wiktextract
Topics: astronomy, natural-sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
noun
Meaning 4
A structure surrounding a sporangium (or part of it) which shrinks and causes it to rupture for spore dispersal; specifically, in a fern: a structure around about two-thirds of the sporangium consisting of differentially thick-walled cells which dry and distort the sporangium; and in a moss: a complete ring of cells around the tip of the sporangium which dissolves to cause the tip to detach.
Definition source: English Wiktionary via Wiktextract
Topics: biology, botany, natural-sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
noun
Meaning 5
The membranous remnants of a partial veil which leaves a ring on the stem of a mushroom.
Definition source: English Wiktionary via Wiktextract
Topics: biology, mycology, natural-sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
6
noun
Meaning 6
A dark ring on a fish's scale that is formed when a fish's growth rate slows down in the winter due to low food intake and the scale's circuli move closer to one another. The dark ring is used to estimate the fish's age, approximately one year per annulus.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
10
noun
Meaning 10
(Fungi) a remnant of the partial veil that in mature mushrooms surrounds the stem like a collar
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: skirt
Antonyms: none provided
Broader terms: plant part, plant structure
11
noun
Meaning 11
a toroidal shape
Definition source: Princeton WordNet 3.0
Examples
a ring of ships in the harbor
a halo of smoke
Meaning relationships
Synonyms: ring, halo, doughnut, anchor ring
Antonyms: none provided
Broader terms: toroid
Narrower terms: fairy ring, fairy circle
History
Etymology
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) + -ulus (diminutive suffix). The plural form annuli is a learned borrowing from Medieval Latin ānnulī.
Across languages
Translations
87 source translations are retained for this English entry.
Aragonese:
aniello
— ring- or donut-shaped area or structure
Asturian:
aniellu
— ring- or donut-shaped area or structure
Catalan:
anell
— ring- or donut-shaped area or structure
Corsican:
anellu
— ring- or donut-shaped area or structure
Finnish:
kehä
— ring- or donut-shaped area or structure
Finnish:
rinkilä
— ring- or donut-shaped area or structure
French:
anneau
— ring- or donut-shaped area or structure
Galician:
anel
— ring- or donut-shaped area or structure
German:
Ring
— ring- or donut-shaped area or structure
Irish:
annalas
— ring- or donut-shaped area or structure
Irish:
fáinne
— ring- or donut-shaped area or structure
Italian:
anello
— ring- or donut-shaped area or structure
Latin:
anulus
— ring- or donut-shaped area or structure
Macedonian:
пр́стен
(pŕsten)
— ring- or donut-shaped area or structure
Malay:
anulus
— ring- or donut-shaped area or structure
Portuguese:
anel
— ring- or donut-shaped area or structure
Romanian:
inel
— ring- or donut-shaped area or structure
Russian:
кольцо́
(kolʹcó)
— ring- or donut-shaped area or structure
Russian:
коле́чко
(koléčko)
— ring- or donut-shaped area or structure
Spanish:
anillo
— ring- or donut-shaped area or structure
Finnish:
rengas
— ring of fibrous tissue; specifically, such a ring around an opening of a heart valve
Finnish:
rengas
— ring of light in a celestial body, especially when caused by an annular eclipse
French:
anneau
— ring of light in a celestial body, especially when caused by an annular eclipse
Navajo:
ahééjiichįįʼ
— ring of light in a celestial body, especially when caused by an annular eclipse
Romanian:
coroană solară
— ring of light in a celestial body, especially when caused by an annular eclipse
Spanish:
corona solar
— ring of light in a celestial body, especially when caused by an annular eclipse
Finnish:
annulus
— structure surrounding a sporangium (or part of it) which shrinks and causes it to rupture for seed dispersal
Finnish:
rengas
— structure surrounding a sporangium (or part of it) which shrinks and causes it to rupture for seed dispersal
Hungarian:
annulusz
— structure surrounding a sporangium (or part of it) which shrinks and causes it to rupture for seed dispersal
Portuguese:
annulus
— structure surrounding a sporangium (or part of it) which shrinks and causes it to rupture for seed dispersal
Arabic:
حَلَقَة
(ḥalaqa)
— remnants of a partial veil which leaves a ring on the stem of a mushroom
Arabic:
حَلْقَة
(ḥalqa)
— remnants of a partial veil which leaves a ring on the stem of a mushroom
Catalan:
anell
— remnants of a partial veil which leaves a ring on the stem of a mushroom
Chinese Mandarin:
蕈環 /蕈环
(xùnhuán)
— remnants of a partial veil which leaves a ring on the stem of a mushroom
Dutch:
annulus
— remnants of a partial veil which leaves a ring on the stem of a mushroom
Finnish:
annulus
— remnants of a partial veil which leaves a ring on the stem of a mushroom
Finnish:
rengas
— remnants of a partial veil which leaves a ring on the stem of a mushroom
Finnish:
rengasvyöhyke
— remnants of a partial veil which leaves a ring on the stem of a mushroom
French:
anneau
— remnants of a partial veil which leaves a ring on the stem of a mushroom
Galician:
anel
— remnants of a partial veil which leaves a ring on the stem of a mushroom
German:
Annulus
— remnants of a partial veil which leaves a ring on the stem of a mushroom
Italian:
anello
— remnants of a partial veil which leaves a ring on the stem of a mushroom
Persian:
حلقه قارچ
— remnants of a partial veil which leaves a ring on the stem of a mushroom
Portuguese:
anel
— remnants of a partial veil which leaves a ring on the stem of a mushroom
Spanish:
anillo
— remnants of a partial veil which leaves a ring on the stem of a mushroom
Venetan:
aneło
— remnants of a partial veil which leaves a ring on the stem of a mushroom
Armenian:
օղակ
(ōġak)
— region in a plane between two concentric circles of different radii
Basque:
koroa zirkular
— region in a plane between two concentric circles of different radii
Bengali:
চাকতি
(cakti)
— region in a plane between two concentric circles of different radii
Catalan:
corona circular
— region in a plane between two concentric circles of different radii
Chinese Mandarin:
環形 /环形
(huánxíng)
— region in a plane between two concentric circles of different radii
Chuvash:
ункӑ
(unk̬ă)
— region in a plane between two concentric circles of different radii
Czech:
mezikruží
— region in a plane between two concentric circles of different radii
Danish:
annulus
— region in a plane between two concentric circles of different radii
Dutch:
cirkelring
— region in a plane between two concentric circles of different radii
Esperanto:
ringo
— region in a plane between two concentric circles of different radii
Estonian:
rõngas
— region in a plane between two concentric circles of different radii
Finnish:
annulus
— region in a plane between two concentric circles of different radii
Finnish:
rengasalue
— region in a plane between two concentric circles of different radii
French:
couronne
— region in a plane between two concentric circles of different radii
German:
Kreisring
— region in a plane between two concentric circles of different radii
Hebrew:
טַבַּעַת
(tabá'at)
— region in a plane between two concentric circles of different radii
Hungarian:
körgyűrű
— region in a plane between two concentric circles of different radii
Indonesian:
anulus
— region in a plane between two concentric circles of different radii
Italian:
anello
— region in a plane between two concentric circles of different radii
Italian:
corona circolare
— region in a plane between two concentric circles of different radii
Japanese:
アニュラス
(anyurasu)
— region in a plane between two concentric circles of different radii
Latvian:
gredzens
— region in a plane between two concentric circles of different radii
Polish:
pierścień kołowy
— region in a plane between two concentric circles of different radii
Portuguese:
coroa circular
— region in a plane between two concentric circles of different radii
Romanian:
coroană circulară
— region in a plane between two concentric circles of different radii
Romanian:
coroană de cerc
— region in a plane between two concentric circles of different radii
Russian:
кольцо́
(kolʹcó)
— region in a plane between two concentric circles of different radii
Slovene:
kolobar
— region in a plane between two concentric circles of different radii
Spanish:
corona circular
— region in a plane between two concentric circles of different radii
Spanish:
annulus
— region in a plane between two concentric circles of different radii
Spanish:
arandela
— region in a plane between two concentric circles of different radii
Swedish:
cirkelring
— region in a plane between two concentric circles of different radii
Tamil:
வட்டவலையம்
(vaṭṭavalaiyam)
— region in a plane between two concentric circles of different radii
Ukrainian:
кільце́
(kilʹcé)
— region in a plane between two concentric circles of different radii
Vietnamese:
hình vành khăn
— region in a plane between two concentric circles of different radii
Finnish:
annulus
— topological space homeomorphic to the region in a plane between two concentric circles of different radii
Finnish:
rengasalue
— topological space homeomorphic to the region in a plane between two concentric circles of different radii
Chinese Mandarin:
環空 /环空
(huánkōng)
— in a well: the space between a pipe or tube and any pipe, tube, casing, or sides of a hole surrounding it
Danish:
annulus
— in a well: the space between a pipe or tube and any pipe, tube, casing, or sides of a hole surrounding it
Finnish:
välitila
— in a well: the space between a pipe or tube and any pipe, tube, casing, or sides of a hole surrounding it
Finnish:
rengasmainen väli
— in a well: the space between a pipe or tube and any pipe, tube, casing, or sides of a hole surrounding it