英和和英

別の表記

• polyedron

語源

From New Latin polyedron, from Ancient Greek πολύεδρος (polúedros, “having many seats”), from πολυ- (polu-, “many”) + ἕδρα (hédra, “seat”); compare French polyèdre. By surface analysis, poly- +‎ -hedron.

発音

• (英国発音) IPA: /ˌpɒlɪˈhiːdɹən/, /ˌpɒliːˈhiːdɹən/, /ˌpɒliːˈhiːdɹɒn/, (dated) /ˌpɒlɪˈhɛdɹən/, /ˌpɒliːˈhɛdɹən/, /ˌpɒliːˈhɛdɹɒn/
• (米国発音) IPA: /ˌpɑliˈhidɹən/, /ˌpɑliˈhidɹɑn/
• 韻: -iːdɹən, -iːdɹɒn, -ɛdɹən, -ɛdɹɒn

名詞

polyhedron (plural polyhedra or polyhedrons)

1. (geometry) A solid figure with many flat faces and straight edges.
   • 1966, Norman W. Johnson, “Convex Polyhedra with Regular Faces”, in Canadian Journal of Mathematics, volume XVIII, number I, Toronto: University of Toronto Press, page 181:

     Of the convex polyhedra with regular faces, the only ones that have tetrahedral, octahedral, or icosahedral symmetry are the Platonic and Archimedean solids.

2. (optics) A polyscope, or multiplying glass.
3. (botany) A stage in the growth of Hydrodictyon, when the resting spore breaks up into several megazoospores that put out horn-like appendages; these polyhedra break up into zoospores.

上位語

• abstract polyhedron
• polytope

下位語

See also Thesaurus:polyhedron

派生語

参考

• apeirohedron
• Schläfli symbol
• spherical polyhedron
• subpolyhedron
• tessellation