**derivative**/dɪˈrɪvətɪv/ adj

- resulting from derivation; derived
- based on or making use of other sources; not original or primary
- copied from others, esp slavishly; plagiaristic

- a term, idea, etc, that is based on or derived from another in the same class
- a word derived from another word
- a compound that is formed from, or can be regarded as formed from, a structurally related compound: chloroform is a derivative of methane
- Also called: differential coefficient, first derivative the change of a function, f(
*x*), with respect to an infinitesimally small change in the independent variable,*x*; the limit of [f(*a*+ Δ*x*)–f(*a*)]*/*Δ*x*, at*x*=*a*, as the increment, Δ*x*, tends to 0. Symbols: df(*x*)/d*x*, f′(*x*), Df(*x*): the derivative of x^{n}is nx^{n–1} - the rate of change of one quantity with respect to another: velocity is the derivative of distance with respect to time
- a financial instrument, such as a futures contract or option, the price of which is largely determined by the commodity, currency, share price, interest rate, etc, to which it is linked