noun

*pl.*-·drons or -·dra

a solid figure with eight plane surfaces

Origin of octahedron

Classical Greek*oktaedron*, neuter of

*oktaedros:*see octa- and -hedron

noun

a solid figure with eight plane surfaces

Origin of octahedron

Classical GreekWebster's New World College Dictionary, Fifth Edition Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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Octahedron. (n.d.). In *YourDictionary*. Retrieved from https://www.yourdictionary.com/Octahedron

noun

A polyhedron with eight faces.

Origin of octahedron

Greek **octahedron**

THE AMERICAN HERITAGE® DICTIONARY OF THE ENGLISH LANGUAGE, FIFTH EDITION by the Editors of the American Heritage Dictionaries. Copyright © 2016, 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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"Octahedron." *YourDictionary*. LoveToKnow. www.yourdictionary.com/Octahedron.

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Octahedron. (n.d.). In *YourDictionary*. Retrieved from https://www.yourdictionary.com/Octahedron

A polyhedron that has eight faces.

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Octahedron. (n.d.). In *YourDictionary*. Retrieved from https://www.yourdictionary.com/Octahedron

Noun

(*plural* octahedra *or* octahedrons)

- (geometry) a polyhedron with eight faces; the regular octahedron has regular triangles as faces and is one of the Platonic solids.

Origin

From Ancient Greek *á½€ÎºÏ„ÏŽ* (oktÅ, “eight") + *á¼•Î´ÏÎ±* (hedra, “seat").

English Wiktionary. Available under CC-BY-SA license.

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"Octahedron." *YourDictionary*. LoveToKnow. www.yourdictionary.com/Octahedron.

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Octahedron. (n.d.). In *YourDictionary*. Retrieved from https://www.yourdictionary.com/Octahedron

- A yellowish
**octahedron**found at De Beers weighed 4282 carats, and yielded a brilliant of 2882 carats. - Ladenburg's prism formula would give two enantiomorphic ortho-di-substitution derivatives; while forms in which the hydrogen atoms are placed at the corners of a regular
**octahedron**would yield enantiomorphic tri-substitution derivatives. - The names of these five solids are: (r) the tetrahedron, enclosed by four equilateral triangles; (2) the cube or hexahedron, enclosed by 6 squares; (3) the
**octahedron**, enclosed by 8 equilateral triangles; (4) the dodecahedron, enclosed by 12 pentagons; (5) the icosahedron, enclosed by 20 equilateral triangles. - The octahedral formula discussed by Julius Thomsen (Ber., 1886, 19, p. 2 944) consists of the six carbon atoms placed at the corners of a regular
**octahedron**, and connected together by the full lines as shown in (I); a plane projection gives a hexagon with diagonals (II). - Two parallel triangular faces are removed from a cardboard model of a regular
**octahedron**, and on the remaining six faces tetrahedra are then placed; the hydrogen atoms are at the free angles.

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