Answer:
In calculus, a derivative is basically the slope of a function. For example the derivative of 3x + 1 is 3, and the derivative of 5x2 is 10x.
A derivative can also be a word derived (made) from another word. For example, "electricity" is a derivative of "electric".
A derivative can also be a compound made from another compound (as in chemistry).
Anything that "results from deviation" can be called a derivative. This basically means that if something is made from, or branches of something else, it can be called a derivative.