Definitions for annulus
ˈæn yə ləs; -ˌlaɪan·nu·lus

Princeton's WordNetRate this definition:5.0 / 1 vote

1. ring, halo, annulus, doughnut, anchor ringnoun

   a toroidal shape

   "a ring of ships in the harbor"; "a halo of smoke"

2. annulus, skirtnoun

   (Fungi) a remnant of the partial veil that in mature mushrooms surrounds the stem like a collar

WiktionaryRate this definition:0.0 / 0 votes

1. annulusnoun

   A ring- or donut-shaped area or structure.

2. annulusnoun

   The region in a plane between two concentric circles of different radius.

3. annulusnoun

   Any topological space homeomorphic to the region in a plane between two concentric circles of different radius.

4. annulusnoun

   The ring of the sun not covered by the moon in an annular solar eclipse.

5. annulusnoun

   Structure in a fern that consists of differentially thick-walled cells on a sporangium that bend and distort as a result of drying.

6. annulusnoun

   The membranous remnants of a partial veil which leaves a ring on the stem of a mushroom.

7. annulusnoun

   The space contained between the centre well bore and any external tubing. Sometimes used for separated gas flow.

ChatGPTRate this definition:0.0 / 0 votes

1. annulus

   An annulus is a geometric shape that consists of the region bounded by two concentric circles. In simpler terms, it resembles a ring or a disc with a circular hole in the middle. It's the area between the two circles. This term is often used in mathematics and physics.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Annulusnoun

   a ring; a ringlike part or space

2. Annulusnoun

   a space contained between the circumferences of two circles, one within the other

3. Annulusnoun

   the solid formed by a circle revolving around a line which is the plane of the circle but does not cut it

4. Annulusnoun

   ring-shaped structures or markings, found in, or upon, various animals

5. Etymology: [L.]

WikidataRate this definition:0.0 / 0 votes

1. Annulus

   The annulus of an oil well refers to any void between any piping, tubing or casing and the piping, tubing, or casing immediately surrounding it. It is named after the corresponding geometric concept. The presence of an annulus gives the ability to circulate fluid in the well, provided that excess drill cuttings have not accumulated in the annulus, preventing fluid movement and possibly sticking the pipe in the borehole. For a new well in the process of being drilled, this would be the void between the drill string and the formation being drilled. An easy way to visualise this would be to stand a straw straight up in the center of a glass of water. All of the water in between the straw and the sides of the glass would be the annulus, with the straw itself representing the drill string and the sides of the glass representing the formation. While drilling, drilling fluid is pumped down the inside of the drill string and pushes the drill cuttings up the annulus to the surface, where the cuttings are removed from the drilling fluid by the shale shakers. In a completed well, there may be many annuli. The 'A' annulus is the void between the production tubing and the smallest casing string. The A annulus can serve a number of crucial tasks, including gas lift and well kills. A normal well will also have a 'B' and frequently a 'C' annulus, between the different casing strings. These annuli do not normally have any connection to well bore fluids, but maintaining pressure in them is important in order to ensure integrity of the casing strings.

Dictionary of Nautical TermsRate this definition:0.0 / 0 votes

1. annulus

   A geometrical figure. (See RING.)

EntomologyRate this definition:0.0 / 0 votes

1. Annulus

   a ring encircling a joint, segment, spot or mark; sometimes applied to the inner ring encircling the mouth opening.

Matched Categories

1. • Fungi
   • Plant Part
   • Toroid

How to pronounce annulus?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say annulus in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of annulus in Chaldean Numerology is: 2

2. Pythagorean Numerology

   The numerical value of annulus in Pythagorean Numerology is: 3

Examples of annulus in a Sentence

1. Alex Young:

   Annular eclipses are similar to total eclipses in that the moon, Earth and sun are aligned so that the moon moves directly in front of the Sun as viewed from Earth, but a total eclipse does not happen, that is the moon does not completely block out the visible disk of the sun because the moon is farther away and so its apparent size in the sky is [ slightly ] smaller than the sun. This means that a tiny ring of annulus of the solar disk is visible around the moon.

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=annulus
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Annulus
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/annulus
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=annulus
6. ^ Dictionary of Nautical Terms
   https://www.gutenberg.org/cache/epub/26000/pg26000-images.html#:~:text=annulus
7. ^ Entomology
   https://www.gutenberg.org/files/22748/22748-h/22748-h.htm#:~:text=annulus