Physically very solid; very difficult to move. / (figuratively) Very strong and dependable.

(geometry) The dual polyhedron of any Archimedean solid.

(simile) Extremely thick and heavy, so as to make it impossible to move. / (simile, of a person) Very reliable and dependable

(topology) The topological space that is a Cartesian product of the two-dimensional disk and the circle.

(geometry) The three-dimensional analog of an angle, equivalent to the area of that portion of the surface of a unit sphere that it subtends.

Alternative form of solid-state

shotgun cartridge with a single projectile

A solid produced by taking a particular two-dimensional curve and rotating it through 360° about an axis. The curve will sweep out a surface, and the region inside the surface defines a solid.

(geometry) Any of several nonconvex regular polyhedra with regular pentagrammatic faces or vertex figures and which can be obtained by stellation of the dodecahedron or icosahedron.

(geometry) Any of five convex polyhedra with congruent regular polygonal faces, which have a high degree of symmetry and have been studied since antiquity.