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annulus    
n. 环,轮,体环

环,轮,体环

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}]


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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 - Definition, Formula, Examples - Math Monks
    An annulus is a flat, ring-shaped structure made out of 2 circles Another way of looking at it is a circular ring with a circular hole in it Mathematically, it is the area between the 2 circles having a common center (concentric circles) lying in the same plane Annulus is expressed in square units such as m 2, cm 2, in 2, and ft 2
  • Annulus - Math is Fun
    An annulus is a flat shape like a ring Its edges are two circles that have the same center The face of a metal washer is an annulus Something shaped like an annulus is said to be annular Because it is a circle with a circular hole, you can calculate the area by subtracting the area of the "hole" from the big circle's area:
  • 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
    The meaning of ANNULUS is 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 - Math word definition - Math Open Reference
    An annulus is a flat ring shaped object, much like the throw-ring shown on the right One way to think of it is a circular disk with a circular hole in it The outer and inner circles that define the ring are concentric (share a common center point)
  • What is an Annulus in Geometry? - Interactive Mathematics
    An annulus is a two-dimensional shape with a curved outer border and a curved inner border It can be used in mathematics, engineering, design, and other applications such as logos or frames for artwork
  • Annulus: Definition, Area Formula Easy Examples Explained - Vedantu
    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
  • Annulus Definition, Area Examples - Study. com
    An annulus is the difference between the outer edges of two concentric circles It can be found by subtracting the area of the smaller circle from the larger circle





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