noun · 2 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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CMU ARPABET:AA2 K T AH0 HH IY1 D R AH0 N
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
a polyhedron with eight faces; the regular octahedron has regular triangles as faces and is one of the Platonic solids.
Definition source: English Wiktionary via Wiktextract
Topics: geometry, mathematics, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
any polyhedron having eight plane faces
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: polyhedron
History
Etymology
From Ancient Greek ὀκτάεδρον (oktáedron). By surface analysis, octa- + -hedron.
Across languages
Translations
34 source translations are retained for this English entry.
Bulgarian:
октаедър
(oktaedǎr)
— a polyhedron with eight faces
Catalan:
octaedre
— a polyhedron with eight faces
Catalan:
octàedre
— a polyhedron with eight faces
Chinese Mandarin:
八面體 /八面体
(bāmiàntǐ)
— a polyhedron with eight faces
Czech:
osmistěn
— a polyhedron with eight faces
Czech:
oktaedr
— a polyhedron with eight faces
Danish:
oktaeder
— a polyhedron with eight faces
Dutch:
achtvlak
— a polyhedron with eight faces
Dutch:
octaëder
— a polyhedron with eight faces
Esperanto:
okedro
— a polyhedron with eight faces
Finnish:
oktaedri
— a polyhedron with eight faces
French:
octaèdre
— a polyhedron with eight faces
German:
Oktaeder
— a polyhedron with eight faces
German:
Achtflächner
— a polyhedron with eight faces
German:
8-Flächner
— a polyhedron with eight faces
Ancient Greek:
ὀκτάεδρον
(oktáedron)
— a polyhedron with eight faces
Hindi:
अष्टफलक
(aṣṭphalak)
— a polyhedron with eight faces
Hungarian:
oktaéder
— a polyhedron with eight faces
Icelandic:
áttflötungur
— a polyhedron with eight faces
Indonesian:
oktahedron
— a polyhedron with eight faces
Indonesian:
bidang delapan
— a polyhedron with eight faces
Italian:
ottaedro
— a polyhedron with eight faces
Japanese:
八面体
(hachimentai)
— a polyhedron with eight faces
Korean:
팔면체
(palmyeonche)
— a polyhedron with eight faces
Latin:
octahedrum
— a polyhedron with eight faces
Polish:
ośmiościan
— a polyhedron with eight faces
Polish:
oktaedr
— a polyhedron with eight faces
Portuguese:
octaedro
— a polyhedron with eight faces
Russian:
окта́эдр
(oktáedr)
— a polyhedron with eight faces
Russian:
восьмигра́нник
(vosʹmigránnik)
— a polyhedron with eight faces
Spanish:
octaedro
— a polyhedron with eight faces
Swedish:
oktaeder
— a polyhedron with eight faces
Tagalog:
waldayag
— a polyhedron with eight faces
Vietnamese:
bát diện
— a polyhedron with eight faces
