Definition of "Derivative" :

noun: the result of mathematical differentiation; the instantaneous change of one quantity relative to another; df(x)/dx

noun: (linguistics) a word that is derived from another word

"Electricity' is a derivative of electric'."

noun: a financial instrument whose value is based on another security

noun: a compound obtained from, or regarded as derived from, another compound

adjective: resulting from or employing derivation

"A derivative process."