| 释义 |
ˌicosiˌdodecaˈhedron Geom.
[f. Gr. εἴκοσι twenty + δώδεκα twelve + ἕδρα seat, base.]
A solid contained by twenty equilateral triangles and twelve regular pentagons, formed by replacing the twelve solid angles of the regular icosahedron by planes corresponding to the faces of a regular dodecahedron.
1570Billingsley Euclid App. def. ii. 459. 1911 Encycl. Brit. XXII. 28/2 The icosidodecahedron..is a 32-faced solid, formed by truncating the vertices of an icosahedron so that the original faces become triangles. 1939H. S. M. Coxeter Ball's Math. Recreations & Ess. (ed. 11) v. 136 The compound of five cubes has the 30 facial planes of a triacontahedron. Reciprocally, the compound of five octahedra has the 30 vertices of an icosidodecahedron. 1972Science 12 May 654 (caption) Icosidodecahedron, its first two stellations, and its final stellation. |