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Topics referred to by the same term
Look up annulus in Wiktionary, the free dictionary. Annulus (or anulus) or annular indicates a ring- or donut-shaped area or structure. It may refer to:
Annulus
Region between two concentric circles
shaped like a ring or a hardware washer. The word "annulus" is borrowed from the Latin word anulus or annulus meaning 'little ring'. The adjectival form is
Annulus_(mathematics)
Species of true bug
Project Noah. Retrieved 2023-05-31. Media related to Sphaerocoris annulus at Wikimedia Commons Data related to Sphaerocoris annulus at Wikispecies v t e
Sphaerocoris_annulus
Topics referred to by the same term
fibrosus tympani, annulus surrounding the membrana tympani This disambiguation page lists articles associated with the title Annulus fibrosus. If an internal
Annulus_fibrosus
Ring-shaped void in a well
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
Annulus_(well)
Valve in the heart connecting the left atrium and left ventricle
fibrous ring known as the mitral annulus. The anterior cusp attaches to one third of the circumference of the annulus, and the posterior cusp attaches
Mitral_valve
External circular ring found in segmented animals such as earthworms and leeches
Allaby, Michael (1999). "Dictionary definition of annulus". encyclopedia.com. Retrieved 11 July 2010. annulus: One of a series of concentric rings or bands
Annulus_(zoology)
Ring on mushroom stipe
An annulus is the ring-like or collar-like structure sometimes found on the stipe of some species of mushrooms. The annulus represents the remnants of
Annulus_(mycology)
In mathematics, on the region between two well-behaved spheres
mathematics, the annulus theorem (formerly called the annulus conjecture) states roughly that the region between two well-behaved spheres is an annulus. It is closely
Annulus_theorem
Signet ring, part of the papal regalia
The Ring of the Fisherman (Latin: Anulus piscatoris; Italian: Anello Piscatorio), also known as the Piscatory Ring, is an official part of the regalia
Ring_of_the_Fisherman
Species of gastropod
subspecies: Monetaria annulus alboguttata Bozzetti, 2015 Monetaria annulus meli Bozzetti, 2018 Monetaria annulus camelorum Monetaria annulus noumeensis (Marie
Monetaria_annulus
Human abdominal anatomy
deep abdominal ring, abdominal inguinal ring, internal inguinal ring, annulus abdominalis) is the entrance to the inguinal canal. The surface marking
Inguinal_canal
2024-01-15. External examples of the use of the term. Annulus, a term used within a firestop patent Annulus, as used in UL System C-AJ-1557 Firestop System
Annulus_(firestop)
Base of the femoral canal
The femoral ring is the opening at the proximal, abdominal end of the femoral canal, and represents the (superiorly directed/oriented) base of the conically-shaped
Femoral_ring
Ring of fibrous tissue around optic nerve at its entrance to the eye
The common tendinous ring, also known as the annulus of Zinn or annular tendon, is a ring of fibrous tissue surrounding the optic nerve at its entrance
Common_tendinous_ring
Ring of specialized cells on the sporangium
the annulus ring, eventually rupturing the sporangial wall by ripping apart thin-walled lip cells on the opposite side of the sporangium. The annulus slowly
Annulus_(botany)
Power series with negative powers
z ) {\displaystyle f(z)} will then be valid anywhere inside the annulus. The annulus is shown in red in the figure on the right, along with an example
Laurent_series
Species of beetle
beetle "Ischnocodia annulus (Fabricius, 1781)". Integrated Taxonomic Information System. Retrieved 17 August 2019. "Ischnocodia annulus Ringed Tortoise Beetle
Ischnocodia_annulus
The umbilical ring is a dense fibrous ring surrounding the umbilicus at birth. At about the sixth week of embryological development, the midgut herniates
Umbilical_ring
Dense structure of connective tissue within the heart
The right fibrous ring is known as the annulus fibrosus dexter cordis, and the left is known as the annulus fibrosus sinister cordis. The right fibrous
Cardiac_skeleton
Fibrocartilaginous structure of spine
Intervertebral discs consist of an outer fibrous ring, the anulus (or annulus) fibrosus disci intervertebralis, which surrounds an inner gel-like center
Intervertebral_disc
Historic Chinese jade piece
"He's jade annulus") or Héshìzhībì (和氏之璧) (using the Classical Chinese grammatical possessive affix zhī (之) was a Bì (璧; "jade annulus") or ceremonial
Mr._He's_jade
Species of virus
Tomato ringspot virus (ToRSV) is a plant pathogenic virus of the family Secoviridae. It affects species of cucumber, tobacco, tomato, cowpea, among others
Tomato_ringspot_virus
Tank-mounted medium machine gun
1939 – November 1941 Purple annulus, Iz on headstamp. Cartridge S.A. Ball 7.92 m/m Mark IIz September 1941 – 1966 Purple annulus, IIz on headstamp Cartridge
Besa_machine_gun
Medical condition
affected equally, with the posterior annulus demonstrating calcification more frequently than the anterior annulus. When MAC does result in mitral stenosis
Mitral_annular_calcification
Species of gastropod
Pupillaea annulus is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets and slit limpets. Bouchet, P
Pupillaea_annulus
Feature of the right atrium in the human heart
completely asymptomatic, or may require surgery. The limbus of fossa ovalis (annulus ovalis) is the prominent oval margin of the fossa ovalis in the right atrium
Fossa_ovalis_(heart)
Region of a galaxy in which life might most likely develop
the Milky Way, its galactic habitable zone is commonly believed to be an annulus with an outer radius of about 10 kiloparsecs (33,000 ly) and an inner radius
Galactic_habitable_zone
Mathematical construct in engineering
{bh^{3}}{12}}+{\frac {hb^{3}}{12}}={\frac {bh}{12}}\left(b^{2}+h^{2}\right)} Consider an annulus whose center is at the origin, outside radius is r 2 {\displaystyle r_{2}}
Second_moment_of_area
Anatomic feature
Georgia. A, Lake Phelps, NC (Phg-2). Note distinct clitellum from annulus XIc2 to annulus XIIIb5, as indicated. B, Santee Swamp, SC (Psa-1). Specimen slightly
Clitellum
Maximum Allowable Annulus Surface Pressure is an absolute upper limit for the pressure in the annulus of an oil and gas well as measured at the wellhead
MAASP
Natural number between 89 and 91
ring. The maximal number of pieces that can be obtained by cutting an annulus with twelve cuts is 90 (and equivalently, the number of 12-dimensional
90_(number)
1887 Imperial Fabergé egg
style and it consists of a solid 18K gold reeded case resting on a gold "annulus" (ring) with waveform decorations held up by three sets of corbel-like
Third_Imperial_(Fabergé_egg)
Medical condition
disjunction (MAD) is a structural abnormality of the heart in the mitral annulus ring. It is generally defined as an abnormal displacement of the location
Mitral_annular_disjunction
Part of the eye
The ciliary body is a part of the eye that includes the ciliary muscle, which controls the shape of the lens, and the ciliary epithelium, which produces
Ciliary_body
Phenomena in vision
steadily fixating on the central dot for many seconds, the peripheral annulus will fade and will be replaced by the colour or texture of the background
Filling-in
Injury to the intervertebral disc
is transferred to the annulus, which may then develop fissures as a result. If the fissures reach the periphery of the annulus, the nuclear material can
Disc_herniation
Genus of Stem-Scalidophoran from Southern China
sclerites being present on a given annulus as well as an unusually large sclerite between the sixth and seventh annulus that measures 340 μm long and 300 μm
Qinscolex
APT
estimation). The rotation can be controlled in the case of an ellipse. The sky annulus will have the same shape as the aperture, but with larger inner and outer
Aperture_Photometry_Tool
Species of dragonfly
Phyllogomphus annulus is a species of dragonfly in the family Gomphidae. It is found in Angola, the Democratic Republic of the Congo, and Uganda. Its
Phyllogomphus_annulus
Mushroom stalk
leathery, firm, etc.) whether it has remains of a partial veil (such as an annulus (ring) or cortina) or universal veil (volva) whether the stipes of many
Stipe_(mycology)
Loss of function in the spine's intervertebral discs
in the annulus. If enough pressure is exerted, it is possible for the nucleus pulposus material to seep out through the tears in the annulus and can
Degenerative_disc_disease
Specialized valve
the annulus to stop the flow of fluids out of the wellbore. Denser mud is then circulated into the wellbore down the drill string, up the annulus and
Blowout_preventer
I-bundles are the annulus and the Möbius band, the only two possible I-bundles over the circle S 1 {\displaystyle S^{1}} . The annulus is a trivial or untwisted
I-bundle
Geometry problem about finding touching circles
concentric. Under this inversion, the solution circles must fall within the annulus between the two concentric circles. Therefore, they belong to two one-parameter
Problem_of_Apollonius
Surgical procedure
jelly-like center of the disc) of the herniated disc bulges out through the annulus (surrounding wall) and presses on the nerve root next to it. 2. degenerative
Anterior cervical discectomy and fusion
Anterior_cervical_discectomy_and_fusion
Species of fungus
season, and membranous annulus. The recently described Psilocybe caeruleorhiza differs from P. ovoideocystidiata in lacking an annulus and fruiting in the
Psilocybe_ovoideocystidiata
Clutch type
with the sun gear as the output, and the annulus normally locked. A series of ball detents act on the annulus to lock it, allowing power to be transmitted
Torque_limiter
Management of oil wells
the formation pressure and the HSP in the annulus when a kick occurs. The pressures encountered in the annulus can be estimated using the following mathematical
Oil_well_control
Mathematical space
representative that is an embedding S 2 → M {\displaystyle S^{2}\to M} . The annulus theorem states that if a pair of disjoint simple closed curves on the boundary
3-manifold
Second-order partial differential equation
Laplace's equation on an annulus (inner radius r = 2 and outer radius R = 4) with Dirichlet boundary conditions u(r=2) = 0 and u(R=4) = 4 sin(5 θ)
Laplace's_equation
Theory in algebraic topology
A Penrose triangle depicts a nontrivial element of the first cohomology of an annulus with values in the group of distances from the observer.
Čech_cohomology
Future annular solar eclipse
blocking most of the Sun's light and causing the Sun to look like an annulus (ring). An annular eclipse appears as a partial eclipse over a region of
Solar eclipse of February 6, 2027
Solar_eclipse_of_February_6,_2027
Seven extrinsic muscles of the eye
Oculomotor nerve (inferior branch) Annulus of Zinn Eye (anterior, medial surface) Adduction Lateral rectus Abducens nerve Annulus of Zinn Eye (anterior, lateral
Extraocular_muscles
functions, as well as chemical injection. It also serves to seal-in the annulus and production areas. "tubing_hanger". glossary.slb.com. Retrieved 1 May
Tubing_hanger
Topics referred to by the same term
choreographer Ring, County Waterford, Ireland Ring, Wisconsin, United States Annulus (mathematics), a geometric planar ring Ring (mathematics), an algebraic
Ring
High-thrust turbofan jet engine
rotor, axial flow, high bypass turbofan Combustor Single annular Twin Annulus Premixing Swirler Control dual channel FADEC Compressor 1 fan, 3-stage
General_Electric_GE9X
Class of artificial membranes containing a semi-permeable hollow fiber barrier
solvent is extruded and an annulus through which a polymer solution is extruded. As the polymer is extruded through the annulus of the spinneret, it retains
Hollow_fiber_membrane
Species of mushroom
ellenae var. yubaensis also has an annulus, but it is smaller than P. longistriata and is not fibrillose. Its annulus and cap are also not striated. Psathyrella
Psathyrella_longistriata
Species of fungus
Psilocybe cubensis, and differs in its habitat preference, less persistent annulus and genetic sequence. List of psilocybin mushrooms List of Psilocybe species
Psilocybe_natalensis
Surface of revolution with a hole in the middle
of revolution. Toroidal inductors and transformers Toroidal propeller Annulus Solenoid Helix Weisstein, Eric W. "Toroid". MathWorld. Stewart, B.; "Adventures
Toroid
Three-dimensional geometric shape
In geometry, a spherical shell (a ball shell) is a generalization of an annulus to three dimensions. It is the region of a ball between two concentric
Spherical_shell
Form of valvular heart disease
shock. The mitral valve apparatus comprises two valve leaflets, the mitral annulus, which forms a ring around the valve leaflets, and the papillary muscles
Mitral_regurgitation
Piping used on drilling rigs
drilling fluid to be pumped down the hole through the bit and back up the annulus. It comes in a variety of sizes, strengths, and wall thicknesses, but is
Drill_pipe
Heavy machine gun
was marked with a red annulus; armouring-piercing ammunition with a green annulus, and incendiary ammunition with a blue annulus. Explosive ammunition
Vickers_machine_gun
Part of the eye
inferior oblique muscle does not originate from the common tendinous ring (annulus of Zinn). Passing lateralward, backward, and upward, between the inferior
Inferior_oblique_muscle
Annular solar eclipse
blocking most of the Sun's light and causing the Sun to look like an annulus (ring). An annular eclipse appears as a partial eclipse over a region of
Solar eclipse of February 17, 2026
Solar_eclipse_of_February_17,_2026
Surface of revolution of a catenary
extra assumption that the annulus is reflection invariant through coordinate planes, and by Kusner and McGrath when the annulus has antipodal symmetry.
Catenoid
An annulus can be approximated by two n-sided boundaries with the same center, but different radius.
Polygon_with_holes
Abnormally-thickened heart valve
relative to the mitral annulus. This allows measurement of the leaflet thickness and their displacement relative to the annulus. Thickening of the mitral
Mitral_valve_prolapse
Type of rocket engine
of an RDE is a detonation wave that travels around a circular channel (annulus). Fuel and oxidizer are injected into the channel, normally through small
Rotating_detonation_engine
Thermal insulation using several thin layers
system. For use in cryogenics, wrapped MLI can be installed inside the annulus of vacuum jacketed pipes. MLI may also be combined with advanced vacuum
Multi-layer_insulation
IADC) AAV – Annulus access valve ABAN – Abandonment, (also as AB and ABD and ABND) ABSA – Alberta Boilers Safety Association ABT – Annulus bore test ACC
List of abbreviations in oil and gas exploration and production
List_of_abbreviations_in_oil_and_gas_exploration_and_production
Species of fungus
epithet, which means "wrinkled-ringed", is a reference to the wrinkled annulus of the fruiting body. The mushroom can grow to 20 centimetres (8 inches)
Stropharia_rugosoannulata
Measure of misalignment between the gradients of pressure and density in a fluid
be investigated in the laboratory using a rotating, fluid filled annulus. The annulus is heated at the outer wall and cooled at the inner wall, and the
Baroclinity
Ring of bone supporting the eye
bony, or scleral cartilage if cartilaginous. The Latin name is Anulus [Annulus] ossicularis sclerae. In some species, there may be a cartilaginous cup
Scleral_ring
Theorem in quantum mechanics
theorem states that all physical properties of a doubly connected system (an annulus) enclosing a magnetic flux Φ {\displaystyle \Phi } through the opening
Byers–Yang_theorem
Minimum dimension for a vehicle to make a turn
Switzerland Road vehicles must be able to carry out a 360 degrees turn on an annulus with an outer radius of 12.5 metres (41 ft) and an inner radius of 5.3
Turning_radius
blocking most of the Sun's light and causing the Sun to look like an annulus (ring). These central eclipses occurs only in a narrow path across Earth's
List of solar eclipses visible from the Philippines
List_of_solar_eclipses_visible_from_the_Philippines
Species of fungus
straw color to brownish or reddish-brown, becoming darker where injured, annulus absent. Odor: Farinaceous Taste: Farinaceous Microscopic features: Spores
Psilocybe_mexicana
Replacement of a failing aortic valve with an artificial one
calcium is removed (debrided) from the aortic annulus. The surgeon measures the size of the aortic annulus and fits a mechanical or tissue valve of the
Aortic_valve_replacement
Permanent or temporary changes to human sex organs
praeputii), but the Romans preferred to apply a gold, silver, or bronze ring (annulus), a metal clasp (fibula) or pin. Use of a kynodesmē may also permanently
Genital modification and mutilation
Genital_modification_and_mutilation
Mathematical approximation of a function
finitely many negative-power terms. More generally, a function analytic in an annulus r < | z − a | < R {\displaystyle r<|z-a|<R} has a convergent Laurent series
Taylor_series
Combustion that leads on to an explosion
arrestor Tank blanketing Vehicle fire suppression system Building design Annulus (firestop) Area of refuge Booster pump Compartmentation Crash bar Electromagnetic
Deflagration
632 solar eclipse
most, but not all, of the Sun's light and causing the Sun to look like an annulus (ring). This eclipse had a magnitude of 0.9836. This eclipse is especially
Muhammad's_eclipse
Annular solar eclipse
blocking most of the Sun's light and causing the Sun to look like an annulus (ring). An annular eclipse appears as a partial eclipse over a region of
Solar eclipse of September 5, 1793
Solar_eclipse_of_September_5,_1793
Drill pipe that transmits drilling fluid
drilling fluid can be pumped down through it and circulated back up the annulus (the void between the drill string and the casing/open hole). The drill
Drill_string
Type of spring shaped like a washer
height remains unaltered, The width of the contact flats (that is the annulus width) is to be approximately 1/150 of the outside diameter, The load applied
Belleville_washer
piece. This is either an octagon that separates pairs of vertices, or an annulus that connects two triangles and/or quadrilaterals by a tube. The concept
Normal_surface
Most common type of echocardiogram
tissue. This can be used to measure motion of the septal and lateral mitral annulus to suggest diastolic heart failure. The images obtained with echocardiography
Transthoracic_echocardiogram
Three-shaft planetary gearset
pitch circle of an outer gear ring, or ring gear, sometimes called an annulus gear. Such an assembly of a planet engaging both a sun gear and a ring
Epicyclic_gearing
Integrated system to drill wells
to circulate drilling fluid (slurry) through the bit and up the casing annulus, for cooling and removing the "cuttings" while a well is drilled. Hoists
Drilling_rig
Rapid ignition of combustible material in an enclosed area
arrestor Tank blanketing Vehicle fire suppression system Building design Annulus (firestop) Area of refuge Booster pump Compartmentation Crash bar Electromagnetic
Flashover
Term in geometric topology
\left(e^{i\left(\theta +2\pi t\right)},t\right)} of the annulus, through the homeomorphisms of the annulus to an open cylinder to the neighborhood of γ a {\displaystyle
Dehn_twist
Property of point sets in Euclidean spaces
An annulus is not a star domain.
Star_domain
septal), all attached at the annulus of the leaflet that notably lacks any fibrotic tissue. Apart from the leaflets and annulus, it also consists of three
Anatomy_of_the_human_heart
Drive for a reciprocating piston pump in an oil well
enters the well bore through the perforations, the gas bubbles up the annulus (the space between the casing and the tubing) while the liquid moves down
Pumpjack
Extended objects found in string theory
D-branes approach each other the interaction is captured by the one loop annulus amplitude of strings between the two branes. The scenario of two parallel
D-brane
Disease in the valves of the heart
usually involve dilation of the valve annulus, thus displacing the valve leaflets, which are anchored in the annulus. Mitral stenosis is caused largely by
Valvular_heart_disease
Extinct class of worms
but sometimes the rings split or only encircle part of the trunk. Each annulus is essentially identical to its neighbours; the only trunk differentiation
Palaeoscolecid
ANNULUS
ANNULUS
ANNULUS
ANNULUS
Boy/Male
Muslim
Plain
Boy/Male
Hindu, Indian, Punjabi, Sikh
God; One Abiding by the Holy Word
Girl/Female
Indian, Sanskrit
Lord of Laxmi
Surname or Lastname
English
English : variant spelling of Jeffries.
Surname or Lastname
English
English : variant spelling of Litton.
Boy/Male
Indian, Punjabi, Sikh
Love for Lord Krishna
Boy/Male
Gujarati, Hindu, Indian, Kannada, Oriya, Telugu
One who Serves his Religion
Boy/Male
Gaelic Scottish
A smith.
Girl/Female
American, British, English, French, Greek, Latin
Cheerful; Derived from Lacey which is a French Nobleman's Surname Brought to British Isles After Norman Conquest; Lace-like
Girl/Female
Hindu, Indian
Name of a River
ANNULUS
ANNULUS
ANNULUS
ANNULUS
ANNULUS
n.
A space contained between the circumferences of two circles, one within the other.
n.
Ring-shaped structures or markings, found in, or upon, various animals.
n.
The solid formed by a circle revolving around a line which is the plane of the circle but does not cut it.
n.
A ring; a ringlike part or space.
pl.
of Annulus