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annulus

n. 環,輪,體環

環,輪,體環

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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英文字典中文字典相關資料:

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. 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 Calculator
Online 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
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 - 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 The area of an annulus refers to the region enclosed between these two concentric circles, which lie in the same plane
Annulus - Math is Fun
An annulus is a flat shape like a ring Its edges are two circles that have the same center

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