/ English Dictionary

POLYHEDRON

Pronunciation (US):

(GB):

Irregular inflected form: polyhedra   

 I. (noun) 

Sense 1

Meaning:

A solid figure bounded by plane polygons or faces

Classified under:

Nouns denoting two and three dimensional shapes

Hypernyms ("polyhedron" is a kind of...):

solid (a three-dimensional shape)

Hyponyms (each of the following is a kind of "polyhedron"):

convex polyhedron (a polyhedron any plane section of which is a convex polygon)

concave polyhedron (a polyhedron some of whose plane sections are concave polygons)

prism (a polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms)

pyramid (a polyhedron having a polygonal base and triangular sides with a common vertex)

tetrahedron (any polyhedron having four plane faces)

pentahedron (any polyhedron having five plane faces)

hexahedron (any polyhedron having six plane faces)

octahedron (any polyhedron having eight plane faces)

decahedron (any polyhedron having ten plane faces)

dodecahedron (any polyhedron having twelve plane faces)

icosahedron (any polyhedron having twenty plane faces)

ideal solid; Platonic body; Platonic solid; regular convex polyhedron; regular convex solid; regular polyhedron (any one of five solids whose faces are congruent regular polygons and whose polyhedral angles are all congruent)

prismatoid (a polyhedron whose vertices all lie in one or the other of two parallel planes; the faces that lie in those planes are the bases of the prismatoid)

trapezohedron (a polyhedron whose faces are trapeziums)

Derivation:

polyhedral (of or relating to or resembling a polyhedron)

Credits

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