词根词缀：-hedral

【来源及含义】adj.

【同源单词】cathedral, dodecahedron, enneacotahedron, hexahedral, hexahedron, holohedral

词根词缀：icosa-, icos-, icosi-, eicosa-

【来源及含义】Greek: the number twenty; used as a prefix

【同源单词】icosacolic, icosahedron, icosandrous, icosanoid, icosasemic, icosian