octahedron

[ ok-tuh-hee-druhn ]

/ ˌɒk təˈhi drən /

Save This Word!

noun, plural oc·ta·he·drons, oc·ta·he·dra

[ok-tuh-hee-druh]. /ˌɒk təˈhi drə/.

a solid figure having eight faces.

QUIZ

CAN YOU ANSWER THESE COMMON GRAMMAR DEBATES?

There are grammar debates that never die; and the ones highlighted in the questions in this quiz are sure to rile everyone up once again. Do you know how to answer the questions that cause some of the greatest grammar debates?

Question 1 of 7

Which sentence is correct?

His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

TAKE THE QUIZ TO FIND OUT

Origin of octahedron

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

Words nearby octahedron

octagonal, octagon house, octagon scale, octahedral, octahedrite, octahedron, octal, octal notation, octamer, octamerous, octameter

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use octahedron in a sentence

He doubted, for the same reason, that particles of air could be shaped like an octahedron.
Undergraduates Hunt for Special Tetrahedra That Fit Together|Kevin Hartnett|February 9, 2021|Quanta Magazine
Dmitry Fuchs proved the results for the octahedron and icosahedron the next year.
The Crooked Geometry of Round Trips|Patrick Honner|January 13, 2021|Quanta Magazine
Of the stauraxonia isopola we have, for instance, the double pyramids, one of the simplest forms of the octahedron.
The Wonders of Life|Ernst Haeckel
Its crystalline forms are very numerous, and are referrible to the octahedron, and the pyramidal prism.
A Dictionary of Arts, Manufactures and Mines|Andrew Ure

The prevailing form of crystallization is the rectangular octahedron, whose angles and edges are variously modified.
A Dictionary of Arts, Manufactures and Mines|Andrew Ure
The members of the group are all tetrads, and have eight funnels, opening on the eight faces of the octahedron.
Occult Chemistry|Annie Besant and Charles W. Leadbeater
We have again the funnel with its ovoids, but now there are eight funnels opening on the eight faces of the octahedron.
Occult Chemistry|Annie Besant and Charles W. Leadbeater

British Dictionary definitions for octahedron

octahedron

/ (ˌɒktəˈhiːdrən) /

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

Scientific definitions for octahedron

octahedron

[ ŏk′tə-hē′drən ]

Plural octahedrons octahedra

A polyhedron that has eight faces.