spherical

1. (geometry) Shaped as a sphere; being a sphere.Examples: "The ability of a segment of a glass sphere to magnify whatever is placed before it was known around the year 1000, when the spherical segment was called a reading stone, essentially what today we might term a frameless magnifying glass or plain glass paperweight."Synonyms: spheric, spheral, globular#Adjective, orbicular#Adjective, round#Adjective

2. (geometry, not comparable) Of, or pertaining to, spheres.not-comparable

3. (mathematics) Of a coordinate system, specifying the location of a point in a plane by using a radius and two angles.

4. (astrology) Of or relating to the heavenly orbs, or to the sphere or spheres in which, according to ancient astronomy and astrology, they were set.Examples: "Knaves, thieves, and treachers by spherical predominance."

5. (statistics, econometrics) Of a multivariate probability distribution, to have a covariance matrix equal to the identity matrix up to a multiplicative factor.Examples: "a spherical Gaussian distribution"