octahedronWiktionary 原文英美构词拆解octaocta-前缀hedron-hedron后缀octa-Eight.-hedron(geometry) Forms the names of solid figures bounded by a certain number of planes (polyhedra).词源链古希腊语Ancient Greek约前 1500–前 300 年ὀκτάεδρον↓ 派生英语Englishoctahedron词源说明From Ancient Greek ὀκτάεδρον (oktáedron). By surface analysis, octa- + -hedron.释义名词noun1(geometry) a polyhedron with eight faces; the regular octahedron has regular triangles as faces and is one of the Platonic solids.同族词派生词 10cubooctahedron·