octaedron

octaedron

1. Alternative spelling of octahedron

• cartooned, coronated

From Ancient Greek ὀκτώ (oktṓ, “eight”) + ἕδρα (hédra, “seat”).

• (Classical) IPA^(key): /okˈta.e.dron/, [ɔkˈt̪äɛd̪rɔn]
• (Ecclesiastical) IPA^(key): /okˈta.e.dron/, [okˈt̪äːed̪ron]

octaedron n (genitive octaedrī); second declension

1. 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.

Second-declension noun (neuter, Greek-type).

• octaedricus

octaedron

1. accusative singular of octaedros