Définitions
1.AdjectiveShaped as a sphere; being a sphere.
2.AdjectiveOf, or pertaining to, spheres.
3.AdjectiveOf a coordinate system, specifying the location of a point in a plane by using a radius and two angles.
4.AdjectiveOf or relating to the heavenly orbs, or to the sphere or spheres in which, according to ancient astronomy and astrology, they were set.
5.AdjectiveOf a multivariate probability distribution, to have a covariance matrix equal to the identity matrix up to a multiplicative factor."a spherical Gaussian distribution"