Preferred Label : Steradian;
NCIt synonyms : str;
NCIt definition : A SI derived unit of solid angle measurement. One steradian is the solid angle that,
having its vertex in the center of a sphere, cuts off an area on the surface of the
sphere equal to that of a square with sides of length equal to the radius of the sphere.
It is equal to 0.25 of the solid angle around a point, 0.079 58 sphere, 0.159 16 hemisphere,
0.636 6 spherical right angle, 3,282.8 square degrees. The solid angle corresponding
to all of space being subtended is 4pi steradians.;
Origin ID : C42544;
UMLS CUI : C1705832;
Currated CISMeF NLP mapping
- Semantic type(s)
- UMLS correspondences (same concept)
