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octahedron
noun
Definition of
octahedron noun
from the Oxford Advanced Learner's Dictionary
octahedron
noun
ˌɒktəˈhiːdrən
ˌɑːktəˈhiːdrən
ˌɒktəˈhedrən
ˌɑːktəˈhedrən
(
geometry
)
a solid figure with eight flat sides, especially one whose sides are eight equal triangles