-hedron

(word root) side, face

Examples of words with the root -hedron: tetrahedron

-hedron

suff.

A crystal or geometric figure having a specified kind or number of surfaces: heptahedron.

[New Latin, from Greek -edron, from neuter of -edros, -sided, from hedrā, face; see sed- in Indo-European roots.]

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.

-hedron

n combining form

(Mathematics) indicating a geometric solid having a specified number of faces or surfaces: tetrahedron.

[from Greek -edron -sided, from hedra seat, base]

-hedral adj combining form

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

-hedron

a combining form used in the names of geometrical solid figures having the form or number of faces specified by the initial element: tetrahedron.

[< Greek -edron, neuter of -edros having bases, -sided, derivative of hédra seat, face of a geometrical form (compare cathedra)]

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References in periodicals archive

The four oxygen atoms, seeking maximum separation from each of the other oxygen atoms, can be seen as the points of a four (tetra-) sided (-hedron) solid (Figure 7-4).

In this case, the six oxygen atoms can be seen as the points of an eight (octa-) sided (-hedron) solid (Figure 7-7).

Chapter 7 Soil minerals and weathering

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