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Related to pentahedron: heptahedron
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n. pl. pen·ta·he·drons or pen·ta·he·dra (-drə)
A solid having five plane faces.

pen′ta·he′dral (-drəl) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -drons or -dra (-drə)
(Mathematics) a solid figure having five plane faces. See also polyhedron
ˌpentaˈhedral adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌpɛn təˈhi drən)

n., pl. -drons, -dra (-drə).
a solid figure having five faces.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pentahedron - any polyhedron having five plane faces
polyhedron - a solid figure bounded by plane polygons or faces
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


nFünfflächner m, → Pentaeder nt
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
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References in classic literature ?
The Sphere would willingly have continued his lessons by indoctrinating me in the conformation of all regular Solids, Cylinders, Cones, Pyramids, Pentahedrons, Hexahedrons, Dodecahedrons, and Spheres: but I ventured to interrupt him.
Among them, the brake caliper adopts the tetrahedral mesh (C3D4) due to the irregular structure, the remaining parts mainly adopt hexahedral unit (C3D8), supplemented with pentahedron unit (C3D6) and terahedral unit (C3D4), and the total number of model units is 327,568.
The proposed cohesive modeling approach is described for hexahedron and pentahedron elements in RADIOSS.
The interface cell [[DELTA].sub.1234] is cut into a triangular pyramid [P.sub.1567] and a pentahedron [P.sub.567234]; see Figure 4(a).