octahedron

[ok-tuh-hee-druh n]

noun, plural oc·ta·he·drons, oc·ta·he·dra [ok-tuh-hee-druh] /ˌɒk təˈhi drə/.

a solid figure having eight faces.

Origin of octahedron

1560–70; < Greek oktáedron eight-sided (neuter of oktáedros), equivalent to okta- octa- + -edron -hedron

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for octahedron

Historical Examples of octahedron

The Octahedron, having eight equilateral triangles as faces.
Bygone Beliefs
H. Stanley Redgrove
Combinations of the cube and octahedron are shown in figs. 6-8.
Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7
Various
It may be derived from the octahedron by suppressing the alternate faces.
Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7
Various
The other piece of money in circulation was octahedron in shape or form.
Memoirs of Orange Jacobs
Orange Jacobs
A cube may be inscribed in an octahedron, its vertices being at the centers of the faces of the octahedron.
The Teaching of Geometry
David Eugene Smith

British Dictionary definitions for octahedron

octahedron

noun plural -drons or -dra (-drə)

a solid figure having eight plane faces

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for octahedron

1560s, from Greek oktahedron, neuter of oktahedros "eight-sided," from okta- "eight" (see octa-) + hedra "seat" (see sedentary). Related: Octahedral.

octahedron in Science

octahedron

[ŏk′tə-hē′drən]

Plural octahedrons octahedra

A polyhedron that has eight faces.