octahedron
/ˌɒktəˈhedrən/noun
(pl. octahedra /-drə/ 或octahedrons)
1- a three-dimensional shape having eight plane faces, especially a regular solid figure with eight equal triangular faces八面体（尤指实心正八面体）。
1.1
- a body, especially a crystal, in the form of a regular octahedron（尤指结晶）正八面体。
派生词
octahedral
adjective词源
late 16th cent.: from Greek oktaedron, neuter (used as a noun) of oktaedros 'eight-faced'.