annulus

listen to the pronunciation of annulus
English - English
The region between two concentric circles of different radius
Structure in a fern that consists of differentially thick-walled cells on a sporangium that bend and distort as a result of drying
The space contained between the centre well bore and any external tubing. Sometimes used for separated gas flow
The ring of the sun not covered by the moon in an annular solar eclipse
The membranous remnants of a partial veil which leaves a ring on the stem of a mushroom
A ring- or donut-shaped area or structure
A membraneous skirt surrounding the stipe of a hymenomycete or gasteromycete (pl annuli) (15)
The ring around a heart valve where the valve leaflet merges with the heart muscle
The tough outer ring of a spinal disc
a tube Each of the above is an annulus: a gluing diagram of an annulus, a ring, and a tube
(1) That space between a drill pipe and the formations through which the drilling fluid (mud) returns to the surface (2) The space between tubing and casing or between casing and formation (3) A ring of interstitial water produced by invasion processes in hydrocarbon-bearing beds when both hydrocarbon and interstitial water phases have mobility and their mobilities are different When Rxo > Ro the annulus will be more conductive than the flushed zone (Rxo) or the uninvaded oil-bearing zone (Rt) When Rxo < Ro, the resistivity of the annulus will be intermediate between that of the flushed zone (Rxo) and the uninvaded oil-bearing zone (Rt)
A ring of tough fibrous tissue at the base of the heart This ring supports and anchors the heart valve(s) into the heart itself There are 4 valve annuli one each for the tricuspid, mitral, aortic, and pulmonary valves These rings of fibrous tissue all converge together in the middle of the heart, and area known as the fibrous skeleton of the heart
A ring of tough fibrous tissue which is attached to and supports the leaflets of the heart valve
(see annular space)
Blasthole Drill - The clearance in the drill hole between the drill pipe and the walls of the hole
A growth ring that is found on scales, opercula and in otoliths Like rings on a tree Counting of the rings can assist in determining the age of a fish and the number of times it has spawned
The region between two concentric circles (Lesson 9 6)
(Fungi) remnant of the partial veil that in mature mushrooms surrounds the lower part of the stem
a ring; the area bounded by two concentric circles
The outer ring of a bi-metallic coin or medal
That place on the sporangia where it dehices to release the spores
a toroidal shape; "a ring of ships in the harbor"; "a halo of smoke"
The skirtlike remnant of the partial veil which shields the lamellae as they produce the spores and protects the spores until they are ready for release It surrounds the upper part of the mushroom stem below the cap and sometimes slips down Not found on every mushroom Also called "annular ring "
Ring-shaped structures or markings, found in, or upon, various animals
A space contained between the circumferences of two circles, one within the other
In astronomy, the ring of the sun not covered by the moon in an annular solar eclipse
The solid formed by a circle revolving around a line which is the plane of the circle but does not cut it
{i} ring; ring-like object
A ring; a ringlike part or space
In mathematics, the region between two concentric circles of different radius
apical annulus
Describes a mushroom with an annulus near the top of the stem
attached annulus
An annulus which is fixed to the stem of a mushroom and is not movable
basal annulus
Describes a mushroom with an annulus located near the bottom of the stem
double annulus
Describes an annulus with two layers of tissue
single annulus
Describes an annulus with just one layer of tissue
Turkish - English
annulus
annulus

    Hyphenation

    an·nu·lus

    Pronunciation

    Etymology

    [ 'an-y&-l&s ] (noun.) 1563. Medieval Latin, from Latin anulus finger ring, from anus ring; more at ANUS.
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