An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

The figure formed by three or more planes meeting at a common point or formed at the vertex of a cone. The solid angle completely surrounding a point is 4π steradian. → steradian.

→ solid; → angle.

Zâviyé, → angle; fazâyi "of or relating to space," → space; jâmed, → solid.