noun 下载 🔗分享 八面体 A polyhedron with eight faces; the regular octahedron has regular triangles as faces and is one of the Platonic solids. Examples : "In math class, we learned that an octahedron is a shape with eight faces. " 在数学课上,我们学到八面体是一种有八个面的立体图形。 math figure 与AI对话词汇游戏阅读练习