Nietzonale
Nietzonale is a term used in Dutch-language scientific literature to describe patterns, fields, or functions that lack zonal symmetry, meaning they are not invariant under rotations around a fixed axis.
Etymology: The word combines niet (not) and zonale (zonal). In English-language texts the corresponding term is
In mathematics and physics, particularly in the analysis of functions on the sphere with spherical harmonics,
Applications: In geophysics, meteorology, and related fields, nietzonale components capture longitudinal variation in global fields such
Notes: The term is relatively uncommon outside Dutch-language literature; in English, non-zonal is the more common