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Definition of polyhedron - 3 dictionary results

pol⋅y⋅he⋅dron

  [pol-ee-hee-druhn]
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–noun, plural -drons, -dra  [-druh] .
a solid figure having many faces.

Origin:
1560–70; < Gk polýedron, neut. of polýedros having many bases. See poly-, -hedron
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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pol·y·he·dron   (pŏl'ē-hē'drən)   
n.   pl. pol·y·he·drons or pol·y·he·dra (-drə)
A solid bounded by polygons.
pol'y·he'dral adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

polyhedron 
1570, from Gk. polyedron, neut. of adj. polyedros "having many bases or sides," from polys "many" (see poly-) + hedra "seat, base, chair, face of a geometric solid," from PIE base *sed- "to sit" (see sedentary).
Online Etymology Dictionary, © 2001 Douglas Harper
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