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annulus

n. 环,轮,体环

环,轮,体环

WordNet (r) 3.0 (2006) (WordNet)

annulus
n 1: a toroidal shape; "a ring of ships in the harbor"; "a halo
of smoke" [synonym: {ring}, {halo}, {annulus}, {doughnut},
{anchor ring}]
2: (Fungi) a remnant of the partial veil that in mature
mushrooms surrounds the stem like a collar [synonym: {annulus},
{skirt}]

The Collaborative International Dictionary of English v.0.48 (gcide)

Annulus \An"nu*lus\, n.; pl. {Annuli}. [L.]
1. A ring; a ringlike part or space.
[1913 Webster]

2. (Geom.)
(a) A space contained between the circumferences of two
circles, one within the other.
(b) The solid formed by a circle revolving around a line
which is the plane of the circle but does not cut it.
[1913 Webster]

3. (Zool.) Ring-shaped structures or markings, found in, or
upon, various animals.
[1913 Webster]

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Annulus (mathematics) - Wikipedia
In mathematics, an annulus (pl : annuli or annuluses) is the region between two concentric circles Informally, it is 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 annular (as in annular eclipse)
Annulus - Math is Fun
An annulus is a flat shape like a ring Its edges are two circles that have the same center
Annulus: Shape, Definition, Formulas - GeeksforGeeks
The term 'annulus' comes from the Latin word annuli, meaning 'little ring ' An annulus is a flat, plane figure formed between two concentric circles, creating a ring-like shape
Annulus - Definition, Formula, Examples - Math Monks
The term ‘annulus’ (plural – annuli) is derived from the Latin word, meaning ‘little ring’ Some real-life example of annulus are doughnut and finger ring
Annulus - Math. net
An annulus (meaning little ring in Latin) is a ring-shaped figure between two concentric circles Below are two examples Think of an annulus as a circle with a concentric hole in it An annulus is something you've probably seen in your everyday life
Annulus - Definition, Formula, Examples - Cuemath
An annulus is a two-dimensional flat figure shaped in a circular form which is constructed by two concentric circles The region or the area formed in between these two concentric circles is called the annulus
ANNULUS Definition Meaning - Merriam-Webster
On Saturday, the moon will pass in front of the sun, obscuring much of it but leaving behind a brilliant ring, or annulus, of unfiltered sunlight in parts of the western United States
Annulus Calculator
Calculate the unknown areas, circumferences and radii of an annulus with any 2 known variables Online calculators and formulas for an annulus and other geometry problems
Area of an annulus - Math Open Reference
The area of the annulus is the area of the ring-shaped space between the two circles that define it In the figure above it is the number of gray square units it takes to fill the annulus
Annulus: Definition, Area Formula Easy Examples Explained
An annulus is a flat, ring-shaped geometric figure It is defined as the region on a plane that lies between two concentric circles —circles that share the same centre point but have different radii

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