棱晶樣的; 棱柱體; 平截頭棱錐體
Prismoid \Pris"moid\ (pr[i^]z"moid), n. [Cf. F. prismto["i]de.] A body that approaches to the form of a prism.
prismoid n : a prismatoid whose bases are polygons having the same number of sides and whose other faces are trapezoids or parallelograms