derivative
[də'rɪvətɪv]
a. , 派

n. , 派, 衍

[] 衍; 数

[医] 衍, 诱, 衍, 诱剂

1. A mark used as a superscript to indicate the first derivative of a variable.
   撇号置符号，标数
2. Not original; derivative.
   ；衍
3. An organic derivative, such as coal or petroleum.
   衍种衍，石油

derivative
[ noun ]

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

<noun.cognition>

2. a compound obtained from, or regarded as derived from, another compound

<noun.substance>

3. a financial instrument whose value is based on another security

<noun.communication>

4. (linguistics) a word that is derived from another word

<noun.communication>
`electricity' is a derivative of `electric'

[ adj ]

1. resulting from or employing derivation

<adj.all>
a derivative process
a highly derivative prose style

Derivative \De*riv"a*tive\, a. [L. derivativus: cf. F.
d['e]rivatif.]
Obtained by derivation; derived; not radical, original, or
fundamental; originating, deduced, or formed from something
else; secondary; as, a derivative conveyance; a derivative
word.

2. Hence, unoriginal (said of art or other intellectual
products.
[PJC]

{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. --Flint. -- {De*riv"a*tive*ly}, adv. --
{De*riv"a*tive*ness}, n.


Derivative \De*riv"a*tive\, 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.