de·riv·a·tive /dɪˈrɪvətɪv/ 形容詞
導出 微分 導數
De·riv·a·tive a. Obtained by derivation; derived; not radical, original, or fundamental; originating, deduced, or formed from something else; secondary; as, a derivative conveyance; a derivative word.
Derivative circulation, a modification of the circulation found in some parts of the body, in which the arteries empty directly into the veins without the interposition of capillaries.
-- De*riv*a*tive*ly, adv. -- De*riv*a*tive*ness, n.
1. That which is derived; anything obtained or deduced from another.
2. Gram. A word formed from another word, by a prefix or suffix, an internal modification, or some other change; a word which takes its origin from a root.
3. Mus. A chord, not fundamental, but obtained from another by inversion; or, vice versa, a ground tone or root implied in its harmonics in an actual chord.
4. Med. An agent which is adapted to produce a derivation (in the medical sense).
5. Math. A derived function; a function obtained from a given function by a certain algebraic process.
Note: ☞ Except in the mode of derivation the derivative is the same as the differential coefficient. See Differential coefficient, under Differential.
6. Chem. A substance so related to another substance by modification or partial substitution as to be regarded as derived from it; thus, the amido compounds are derivatives of ammonia, and the hydrocarbons are derivatives of methane, benzene, etc.
adj : resulting from or employing derivation; "a derivative
process"; "a highly derivative prose style"
n 1: the result of mathematical differentiation; the
instantaneous change of one quantity relative to
another; df(x)/dx [syn: derived function, differential
coefficient, differential, first derivative]
2: a financial instrument whose value is based on another
security [syn: derivative instrument]
3: (linguistics) a word that is derived from another word;
"`electricity' is a derivative of `electric'"