enneahedral

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enneahedral
enneahedral, a. (ˌɛnɪəˈhiːdrəl) Also 9 enneaedral. [f. Gr. ἐννέα nine + ἔδρα base + -al1.] Having nine faces.1802 Bournon in Phil. Trans. XCII. 253 Which..render the pyramids enneaedral. Oxford English Dictionary
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Enneahedron
Five Johnson solids have enneahedral duals: the triangular cupola, gyroelongated square pyramid, self-dual elongated square pyramid, triaugmented triangular wikipedia.org
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prosenneahedral
prosˌenneaˈhedral, a. Cryst. rare. [f. F. prosenneaèdre (Haüy) (f. Gr. πρός approaching to + enneaèdre) + -al1, after enneahedral.] (See quot.) Also prosenneˈëdrous a. rare—0.1805–17 R. Jameson Char. Min. (ed. 3) 208 Prosenneahedral,..having nine faces on two adjacent parts, as in the prosenneahedra... Oxford English Dictionary
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