Part 191

The derival of e from a.

Earle.

Der"i*vate (?), a. [L. derivatus, p. p. of derivare. See Derive.] Derived; derivative. [R.] H. Taylor. -- n. A thing derived; a derivative. [R.]

Der"i*vate (?), v. t. To derive. [Obs.] Huloet.

Der`i*va"tion (?), n. [L. derivatio: cf. F. dérivation. See Derive.] 1. A leading or drawing off of water from a stream or source. [Obs.] T. Burnet.

2. The act of receiving anything from a source; the act of procuring an effect from a cause, means, or condition, as profits from capital, conclusions or opinions from evidence.

As touching traditional communication, . . . I do not doubt but many of those truths have had the help of that derivation.

Sir M. Hale.

3. The act of tracing origin or descent, as in grammar or genealogy; as, the derivation of a word from an Aryan root.

4. The state or method of being derived; the relation of origin when established or asserted.

5. That from which a thing is derived.

6. That which is derived; a derivative; a deduction.

From the Euphrates into an artificial derivation of that river.

Gibbon.

7. (Math.) The operation of deducing one function from another according to some fixed law, called the law of derivation, as the operation of differentiation or of integration.

8. (Med.) A drawing of humors or fluids from one part of the body to another, to relieve or lessen a morbid process.

Der`i*va"tion*al (?), a. Relating to derivation. Earle.

De*riv"a*tive (?), a. [L. derivativus: cf. F. dérivatif.] 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. Flint.

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

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.

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.

De*rive" (?), v. t. [imp. & p. p. Derived (?); p. pr. & vb. n. Deriving.] [F. dériver, L. derivare; de- + rivus stream, brook. See Rival.] 1. To turn the course of, as water; to divert and distribute into subordinate channels; to diffuse; to communicate; to transmit; -- followed by to, into, on, upon. [Obs.]