It is a complicated function, but the simplest term is probably a Search function. However that is far too simple a description and does not give its full description and show what it is capable of doing.
Motion.
warranty
Range.
The term that best describes the movement is gradual.
Third line of defence, memory, long term protection
The term that best describes the movement is gradual.
linear function
The range of the function.
Histology
Medial Malleolus is the best term that describes the inner aspect of the ankle
The image describes it
In Excel a function within another function would be called a nested function.