As an adjective nonlinear
is (of a set of points) not lying on a straight line.
As a noun backstepping is
(control theory) a technique for designing stabilizing controls for a special recursive class of nonlinear dynamical systems.
nonlinear English
Alternative forms
* nonlinear
Adjective
( )
(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
Antonyms
* linear
Derived terms
* nonlinearity

backstepping English
Noun
( )
( wikipedia backstepping)
(control theory) A technique for designing stabilizing controls for a special recursive class of nonlinear dynamical systems.
(geology) A gradual backward movement of organisms or a sedimentary environment caused by changes in environmental factors.
* {{quotenews, year=2009, date=April 16, author=Andrew C. Revkin, title=Coral Fossils Suggest That Sea Level Can Rise Rapidly, work=New York Times citation
, passage=Once the sea level stabilized again, the same group of corals grew once more, but farther inshore and up to 10 feet higher in elevation, a process known to geologists as backstepping . }} 