A solid body standing on a triangular, square or polygonal base, and terminating in a point at the top; or in geometry, a solid figure consisting of several triangles, whose bases are all in the same plane, and which have one common vertex.

A solid body standing ona triangular, square or polygonal base, and terminating in a point at the top; or in geometry, a solid figure consisting of several triangles, whose bases are all in the same plane, and which have one common vertex. The pyramids of Egypt may have been erected to the sun, during the prevalence of Sabianism. A pyramid is formed by the meeting of three or more planes at a point termed the apex.