octaedron
English
editNoun
editoctaedron
- Alternative spelling of octahedron
Anagrams
editLatin
editEtymology
editFrom Ancient Greek ὀκτώ (oktṓ, “eight”) + ἕδρα (hédra, “seat”).
Pronunciation
edit- (Classical Latin) IPA(key): /okˈta.e.dron/, [ɔkˈt̪äɛd̪rɔn]
- (modern Italianate Ecclesiastical) IPA(key): /okˈta.e.dron/, [okˈt̪äːed̪ron]
Noun
editoctaedron n (genitive octaedrī); second declension
- octahedron
- 1611, Johannes Kepler, Strena seu de nive sexangula 20:
- Aiunt gemmarii naturalia in adamantibus inveniri octaedra, perfectissimae et limatissimae formae.
- Jewelers say that natural octahedra of the most perfect and most refined form are found in diamonds.
- Aiunt gemmarii naturalia in adamantibus inveniri octaedra, perfectissimae et limatissimae formae.
Declension
editSecond-declension noun (neuter, Greek-type).
Case | Singular | Plural |
---|---|---|
Nominative | octaedron | octaedra |
Genitive | octaedrī | octaedrōrum |
Dative | octaedrō | octaedrīs |
Accusative | octaedron | octaedra |
Ablative | octaedrō | octaedrīs |
Vocative | octaedron | octaedra |
Derived terms
editNoun
editoctaedron