STERADIAN

Steradian

The steradian is the SI unit of solid angle. It is used in three-dimensional space, and functions analogously to the manner in which the radian quantifies planar angles. The name is derived from the Greek stereos for "solid" and the Latin radius for "ray, beam".

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steradian

Noun

  1. In the International System of Units, the derived unit of solid angle; the solid angle subtended at the centre of a sphere of radius r by a portion of the surface of the sphere that has area r2. Symbol: sr


The above text is a snippet from Wiktionary: steradian
and as such is available under the Creative Commons Attribution/Share-Alike License.

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