icosahedronn.

Brit.

/ˌʌɪkəʊsəˈhiːdrən/,

/ˌʌɪkəʊsəˈhɛdrən/,

/ˌʌɪkɒsəˈhiːdr(ə)n/,

/ʌɪˌkɒsəˈhiːdr(ə)n/, U.S.

/aɪˌkoʊsəˈhidrən/,

/aɪˌkɑsəˈhidrən/

Forms: Also 1500s–1700s icosaedrum, 1500s–1800s icosaedron, 1600s eicosaedrum, (1700s eicosihedron).

Etymology: < Greek εἰκοσάεδρον, neuter of εἰκοσάεδρος, < εἴκοσι twenty + ἕδρα seat, base.

Geometry.

A solid contained by twenty plane faces; spec. the regular icosahedron, contained by twenty equal equilateral triangles.

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

1570 H. Billingsley tr. Euclid Elements Geom. xiii. f. 409^v The opposite sides of an Icosahedron are parallels.

1571 T. Digges in L. Digges's Geom. Pract.: Pantometria Defs. xvi. sig. T ij ^v Icosaedron..marg. Icosaedrum.

1655 H. More Antidote against Atheism (ed. 2) App. ii. 297 There are Fiue regular Bodies..the Cube, the Tetraedrum, the Octaedrum, the Dodecaedrum, and the Eicosaedrum.

1785 T. Reid Ess. Intellect. Powers vi. viii. 658 Five regular solid figures..the tetrahedron..and the eicosihedron.

1881 R. Routledge Pop. Hist. Sci. i. 25 To each element Plato assigns a geometrical solid: to earth, the cube; to fire, the pyramid; to air, the octahedron; to water, the icosahedron.

Derivatives

icosaˈhedral adj. of the form of an icosahedron; having twenty faces.

ΚΠ

1828 in N. Webster Amer. Dict. Eng. Lang.

1855 R. G. Mayne Expos. Lexicon Med. Sci. (1860) Icosihedral.

This entry has not yet been fully updated (first published 1899; most recently modified version published online March 2022).

单词	icosahedron
释义	icosahedronn. Brit. /ˌʌɪkəʊsəˈhiːdrən/, /ˌʌɪkəʊsəˈhɛdrən/, /ˌʌɪkɒsəˈhiːdr(ə)n/, /ʌɪˌkɒsəˈhiːdr(ə)n/, U.S. /aɪˌkoʊsəˈhidrən/, /aɪˌkɑsəˈhidrən/ Forms: Also 1500s–1700s icosaedrum, 1500s–1800s icosaedron, 1600s eicosaedrum, (1700s eicosihedron). Etymology: < Greek εἰκοσάεδρον, neuter of εἰκοσάεδρος, < εἴκοσι twenty + ἕδρα seat, base. Geometry. A solid contained by twenty plane faces; spec. the regular icosahedron, contained by twenty equal equilateral triangles. 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 1570 H. Billingsley tr. Euclid Elements Geom. xiii. f. 409^v The opposite sides of an Icosahedron are parallels. 1571 T. Digges in L. Digges's Geom. Pract.: Pantometria Defs. xvi. sig. T ij ^v Icosaedron..marg. Icosaedrum. 1655 H. More Antidote against Atheism (ed. 2) App. ii. 297 There are Fiue regular Bodies..the Cube, the Tetraedrum, the Octaedrum, the Dodecaedrum, and the Eicosaedrum. 1785 T. Reid Ess. Intellect. Powers vi. viii. 658 Five regular solid figures..the tetrahedron..and the eicosihedron. 1881 R. Routledge Pop. Hist. Sci. i. 25 To each element Plato assigns a geometrical solid: to earth, the cube; to fire, the pyramid; to air, the octahedron; to water, the icosahedron. Derivatives icosaˈhedral adj. of the form of an icosahedron; having twenty faces. ΚΠ 1828 in N. Webster Amer. Dict. Eng. Lang. 1855 R. G. Mayne Expos. Lexicon Med. Sci. (1860) Icosihedral. This entry has not yet been fully updated (first published 1899; most recently modified version published online March 2022). < n.1570
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