We found 27 dictionaries that define the word octahedron:

General (21 matching dictionaries)

1. octahedron: Merriam-Webster
2. octahedron: Oxford Learner's Dictionaries
3. octahedron: American Heritage Dictionary of the English Language
4. octahedron: Collins English Dictionary
5. octahedron: Vocabulary.com
6. Octahedron, octahedron: Wordnik
7. octahedron: Cambridge Advanced Learner's Dictionary
8. octahedron: Wiktionary
9. octahedron: Webster's New World College Dictionary, 4th Ed.
10. octahedron: The Wordsmyth English Dictionary-Thesaurus
11. octahedron: Infoplease Dictionary
12. octahedron: Dictionary.com
13. Octahedron (album), Octahedron: Wikipedia, the Free Encyclopedia
14. Octahedron: Online Plain Text English Dictionary
15. octahedron: Webster's Revised Unabridged, 1913 Edition
16. octahedron: Rhymezone
17. Octahedron: AllWords.com Multi-Lingual Dictionary
18. octahedron: Webster's 1828 Dictionary
19. octahedron: FreeDictionary.org
20. octahedron: Mnemonic Dictionary
21. octahedron: TheFreeDictionary.com

Art (1 matching dictionary)

22. octahedron: ArtLex Lexicon of Visual Art Terminology

Computing (1 matching dictionary)

23. octahedron: Encyclopedia

Medicine (1 matching dictionary)

24. online medical dictionary (No longer online)

Science (2 matching dictionaries)

25. Octahedron: Eric Weisstein's World of Mathematics
26. octahedron, octahedron: PlanetMath Encyclopedia

Slang (1 matching dictionary)

27. Octahedron: Urban Dictionary

(Note: See octahedra as well.)

Definitions from Wiktionary (octahedron) ▸ noun:  (geometry) a polyhedron with eight faces; the regular octahedron has regular triangles as faces and is one of the Platonic solids. Similar: octohedron, dodecahedron, icosahedron, dodecaedron, duodecahedron, octakishexahedron, cuboctahedron, great cubicuboctahedron, pentahedron, muoctahedron, more... Opposite: hexahedron, tetrahedron, dodecahedron, icosahedron Types: cube, hexahedron, tetrahedron, dodecahedron, icosahedron, more... Phrases: regular octahedron, truncated octahedron, cubo octahedron, Stellated octahedron, more... Adjectives: regular, truncated, distorted, cubo, rhombic, perfect, faced, elongated, central, rectangular, square ▸ Words similar to octahedron ▸ Usage examples for octahedron ▸ Idioms related to octahedron ▸ Wikipedia articles (New!) ▸ Popular adjectives describing octahedron ▸ Words that often appear near octahedron ▸ Rhymes of octahedron ▸ Invented words related to octahedron