Variation Biodiversity Genetic diversity, differences within a species Physics Magnetic variation, difference between magnetic north and true north, measured as an angle Variation (astronomy), any perturbation of the mean motion or orbit of a planet or satellite, particularly of the Moon popo Mathematics Bounded variation Calculus of variations, a field of mathematics which deals with functions of functions. Permutation Statistics Coefficient of variation in statistics, the magnitude of… (More on Variation)