An Etymological Dictionary of Astronomy and Astrophysics

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.

Etymology (EN): → solid; → angle.

Etymology (PE): Zâviyé, → angle; fazâyi “of or relating to space,” → space; jâmed, → solid.