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icosahedron

XDict

n. 二十面体

PyDict

二十面体

WordNet (r) 3.0 (2006) (WordNet)

icosahedron
n 1: any polyhedron having twenty plane faces

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

Icosahedron \I`co*sa*he"dron\, n. [Gr. ?; ? twenty ? seat,
base, fr. ? to sit.] (Geom.)
A solid bounded by twenty sides or faces.
[1913 Webster]

{Regular icosahedron}, one of the five regular polyhedrons,
bounded by twenty equilateral triangules. Five triangles
meet to form each solid angle of the polyhedron.
[1913 Webster]

English-Italian (Internet Dictionary Project)

icosaedro[Noun]

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Icosahedron - Wikipedia
In geometry, an icosahedron ( ˌaɪkɒsəˈhiːdrən, - kə -, - koʊ - or aɪˌkɒsəˈhiːdrən [1]) is a polyhedron with 20 faces The name comes from Ancient Greek εἴκοσι (eíkosi) 'twenty' and ἕδρα (hédra) 'seat' The plural can be either "icosahedra" ( - drə ) or "icosahedrons"
Icosahedron - Math is Fun
For a regular icosahedron (where all faces are equilateral triangles): The name icosahedron comes from the Greek icosa- meaning 20, because it is a polyhedron with 20 faces When we have more than one icosahedron they are called icosahedra
Icosahedron - Cuemath
The icosahedron's definition is derived from the ancient Greek words Icos (eíkosi) meaning 'twenty' and hedra (hédra) meaning 'seat' It is one of the five platonic solids with equilateral triangular faces
Icosahedron - Math. net
What is an icosahedron An icosahedron is a three-dimensional figure made up of only polygons One real life icosahedron example is a 20-sided die, also referred to as D20: The 20-sided die above is an example of a regular icosahedron, since all of its faces are made up of 20 equilateral triangles
Icosahedron – The Geometry of Thinking
The icosahedron is distinguished from the other regular polyhedra in that it has an irrational volume both in tetrahedra and cubes Its isolation is further reinforced by its axes of spin and the 31 great circles they describe
Icosahedron - Virtual Math Museum
When a newly created face becomes equilateral triangle, it is a icosahedron Wireframe shows edge truncated icosahedron, inside is its dual, which has 60 congruent quadrilateral faces (kites)
Icosahedron -- from Wolfram MathWorld
The (general) icosahedron is a 20-faced polyhedron (where icos- derives from the Greek word for "twenty" and -hedron comes from the Indo-European word for "seat")

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