from The American Heritage® Dictionary of the English Language, 5th Edition.
noun A solid bounded by polygons.
from The Century Dictionary.
noun In geometry, a solid bounded by plane faces.
noun In optics, a multiplying glass or lens consisting of several plane surfaces disposed in a convex form, through each of which an object is seen; a polyscope.
noun In bot.,in Hydrodictyon or water-net, one of the special angular cells with horn-like processes formed by the swarm-cells produced in the zygospore, within each of which a new cœnobium is developed.
from the GNU version of the Collaborative International Dictionary of English.
noun (Geom.) A body or solid contained by many sides or planes.
noun (Opt.) A polyscope, or multiplying glass.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
noun geometry A solidfigure with many flat faces and straight edges.
noun optics A polyscope, or multiplying glass.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun a solid figure bounded by plane polygons or faces
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
From New Latin, from Ancient Greek πολύεδρον (poluedron), from πολύς (polus, "many") + ἕδρα (hedra, "seat"); compare French polyèdre.
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Examples
One windowed side of the polyhedron opens to a teak deck leading into nature; and a skylight casts natural light on a workspace and sofa inside.
A dodecahedron is any polyhedron with twelve faces, but usually a regular dodecahedron is meant: a Platonic solid composed of twelve regular pentagonal faces, with three meeting at each vertex.
You can now visualize the spikey polyhedron (which Michael Trott discussed in a recent blog post) instantly using the new PolyhedronData function in Mathematica.
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