Scientific Symbols | International System Of Units | Part 2
Decimal system established by the 11th General Conference on Weights and Measures (GCWM) in 1960 and used by many countries.
solid angle = a three-dimensional analogue of an angle, such as that subtended by a cone or formed by planes meeting at a point
subtend = GEOMETRY (of a line, arc, or figure) form (an angle) at a particular point when straight lines from its extremities are joined at that point
See also