octahedron [ˈɑ:ktəˈhi:drən]

例句:

• An octahedral tessellation approximates a spherewith an octahedron whose vertices are all on the unIt'sphere.
  八面体三角化把球面近似于一个顶点在单位球上的八面体.
  
• The cycle sum of the rotation group of the octahedron was calculated.
  正八面体的旋转群的循环和已算出.
  
• Making oars. First step - from square to octahedron.
  制作浆. 第一步从方形到八面形.