As an adjective nonlinear
is (of a set of points) not lying on a straight line.
As a noun superstatistics is
(mathematics|physics) a branch of statistical mechanics that studies certain nonlinear systems.
(of a set of points) not lying on a straight line
(chemistry, of a molecule) whose atoms do not lie in a straight line
(mathematics, of a function) having a product of independent variables, or a variable with an exponent not equal to one
(of a system) whose output is not directly proportional to its input
erratic and unpredictable; tending to jump back and forth
- a film with a nonlinear plot
(mathematics, physics) A branch of statistical mechanics that studies certain nonlinear systems