solid - a three-dimensional shape

convex polyhedron - a polyhedron any plane section of which is a convex polygon

concave polyhedron - a polyhedron some of whose plane sections are concave polygons

prism - a polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms

pyramid - a polyhedron having a polygonal base and triangular sides with a common vertex

tetrahedron - any polyhedron having four plane faces

pentahedron - any polyhedron having five plane faces

hexahedron - any polyhedron having six plane faces

octahedron - any polyhedron having eight plane faces

decahedron - any polyhedron having ten plane faces

dodecahedron - any polyhedron having twelve plane faces

icosahedron - any polyhedron having twenty plane faces

ideal solid, Platonic body, Platonic solid, regular convex polyhedron, regular convex solid, regular polyhedron - any one of five solids whose faces are congruent regular polygons and whose polyhedral angles are all congruent

prismatoid - a polyhedron whose vertices all lie in one or the other of two parallel planes; the faces that lie in those planes are the bases of the prismatoid

trapezohedron - a polyhedron whose faces are trapeziums