Of a cone, the ratio of the area cut out on a spherical surface (with its centre at
the
apex of that cone) to the square of the radius of the sphere. It is a quantity of dimension
one (dimensionless quantity) with unit
steradian
(
).
Source:
PAC, 1996, 68, 957
(Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations
1996))
on page 992
,
