icositetrahedronn.

Etymology: < Greek εἴκοσι twenty + τετρα- four + ἕδρα seat, base (compare tetrahedron n.).Previous versions of the OED give the stress as: ˌicosiˌtetraˈhedron.

Geometry and Crystallography.

A solid figure contained by twenty-four plane faces; esp. a form contained by twenty-four equal symmetrical trapeziums or deltoids, also called deltohedron or trapezohedron.

ΘΚΠ

the world > relative properties > number > geometry > shape or figure > [noun] > three-dimensional > with fourteen or more faces

icosahedron1570

icosidodecahedron1570

icosaeder1656

chiliahedron1690

tetrahexahedron1816

icositetrahedron1831

trisoctahedron1837

pentahexahedron1857

hexakisoctahedron1878

tetrakaidekahedron1894

triacontahedron1939

1831 D. Brewster Treat. Optics xxv. 214 The most common form of the analcime is the solid called the icositetrahedron, which is bounded by twenty-four equal and similar trapezia.

1879 F. Rutley Study of Rocks x. 140 All the members of this group crystallise in the cubic system, the common forms being either the rhombic dodecahedron or the icositetrahedron.

Derivatives

icositetraˈhedroid n.

ΚΠ

1880 Academy 30 Oct. 314 Four-dimensional space may be built up with..ikosatetrahedroids.

This entry has not yet been fully updated (first published 1899; most recently modified version published online June 2019).

单词	icositetrahedron
释义	icositetrahedronn. Etymology: < Greek εἴκοσι twenty + τετρα- four + ἕδρα seat, base (compare tetrahedron n.).Previous versions of the OED give the stress as: ˌicosiˌtetraˈhedron. Geometry and Crystallography. A solid figure contained by twenty-four plane faces; esp. a form contained by twenty-four equal symmetrical trapeziums or deltoids, also called deltohedron or trapezohedron. ΘΚΠ the world > relative properties > number > geometry > shape or figure > [noun] > three-dimensional > with fourteen or more faces icosahedron1570 icosidodecahedron1570 icosaeder1656 chiliahedron1690 tetrahexahedron1816 icositetrahedron1831 trisoctahedron1837 pentahexahedron1857 hexakisoctahedron1878 tetrakaidekahedron1894 triacontahedron1939 1831 D. Brewster Treat. Optics xxv. 214 The most common form of the analcime is the solid called the icositetrahedron, which is bounded by twenty-four equal and similar trapezia. 1879 F. Rutley Study of Rocks x. 140 All the members of this group crystallise in the cubic system, the common forms being either the rhombic dodecahedron or the icositetrahedron. Derivatives icositetraˈhedroid n. ΚΠ 1880 Academy 30 Oct. 314 Four-dimensional space may be built up with..ikosatetrahedroids. This entry has not yet been fully updated (first published 1899; most recently modified version published online June 2019). < n.1831
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