| 单词 | derivative |
| 释义 | Word Frequency derivative(dɪˈrɪvətɪv) adjective 1. resulting from derivation; derived 2. based on or making use of other sources; not original or primary 3. copied from others, esp slavishly; plagiaristic noun 4. a term, idea, etc, that is based on or derived from another in the same class 5. a word derived from another word 6. chemistry a compound that is formed from, or can be regarded as formed from, a structurallyrelated compound chloroform is a derivative of methane 7. mathematics a. 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)/dx, f′(x), Df(x) the derivative of xn is nxn–1 b. the rate of change of one quantity with respect to another velocity is the derivative of distance with respect to time 8. finance a. (usually plural) 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 b. (as modifier) a derivatives trader 9. psychoanalysis an activity that represents the expression of hidden impulses and desires by channelling them into socially acceptable forms Derived forms derivatively (deˈrivatively) adverb |
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