Webster's Dictionary, 1913

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Derisive adjective Expressing, serving for, or characterized by, derision. " Derisive taunts." Pope. -- De*ri"sive*ly , adverb -- De*ri"sive*ness , noun

Derisory adjective [ Latin derisorius : confer French dérisoire .] Derisive; mocking. Shaftesbury.

Derivable adjective [ From Derive .] That can be derived; obtainable by transmission; capable of being known by inference, as from premises or data; capable of being traced, as from a radical; as, income is derivable from various sources.

All honor derivable upon me.
South.

The exquisite pleasure derivable from the true and beautiful relations of domestic life.
H. G. Bell.

The argument derivable from the doxologies.
J. H. Newman.

Derivably adverb By derivation.

Derival noun Derivation. [ R.]

The derival of e from a .
Earle.

Derivate adjective [ Latin derivatus , past participle of derivare . See Derive .] Derived; derivative. [ R.] H. Taylor. -- noun A thing derived; a derivative. [ R.]

Derivate transitive verb To derive. [ Obsolete] Huloet.

Derivation noun [ Latin derivatio : confer French dérivation . See Derive .]
1. A leading or drawing off of water from a stream or source. [ Obsolete] 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. (Medicine) A drawing of humors or fluids from one part of the body to another, to relieve or lessen a morbid process.

Derivation noun The formation of a word from its more original or radical elements; also, a statement of the origin and history of a word.

Derivational adjective Relating to derivation. Earle.

Derivative adjective [ Latin derivativus : confer French 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 , adverb -- De*riv"a*tive*ness , noun

Derivative noun
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. (Medicine) 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. (Chemistry) 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.

Derive transitive verb [ imperfect & past participle Derived ; present participle & verbal noun Deriving .] [ French dériver , Latin 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 . [ Obsolete]

For fear it [ water] choke up the pits . . . they [ the workman] derive it by other drains.
Holland.

Her due loves derived to that vile witch's share.
Spenser.

Derived to us by tradition from Adam to Noah.
Jer. Taylor.

2. To receive, as from a source or origin; to obtain by descent or by transmission; to draw; to deduce; -- followed by from .

3. To trace the origin, descent, or derivation of; to recognize transmission of; as, he derives this word from the Anglo-Saxon.

From these two causes . . . an ancient set of physicians derived all diseases.
Arbuthnot.

4. (Chemistry) To obtain one substance from another by actual or theoretical substitution; as, to derive an organic acid from its corresponding hydrocarbon.

Syn. -- To trace; deduce; infer.

Derive intransitive verb To flow; to have origin; to descend; to proceed; to be deduced. Shak.

Power from heaven
Derives , and monarchs rule by gods appointed.
Prior.

Derivement noun That which is derived; deduction; inference. [ Obsolete]

I offer these derivements from these subjects.
W. Montagu.

Deriver noun One who derives.

Derk adjective Dark. [ Obsolete] Chaucer.

Derm noun [ Greek de`rma , -atos , skin, from ... to skin, flay: confer French derme . See Tear , transitive verb ]
1. The integument of animal; the skin.

2. (Anat.) See Dermis .

Derma noun [ New Latin See Derm .] (Anat.) See Dermis .

Dermal adjective [ From Derm .]
1. Pertaining to the integument or skin of animals; dermic; as, the dermal secretions.

2. (Anat.) Pertaining to the dermis or true skin.

Dermaptera, Dermapteran noun (Zoology) See Dermoptera , Dermopteran .

Dermatic, Dermatine adjective [ Greek ..., ..., from ... skin.] Of or pertaining to the skin.

Dermatitis noun [ New Latin , from Greek de`rma , -atos , skin + -itis .] (Medicine) Inflammation of the skin.

Dermatogen noun [ Greek de`rma , -atos , skin + -gen .] (Botany) Nascent epidermis, or external cuticle of plants in a forming condition.

Dermatography noun [ Greek de`rma , -atos , skin + -graphy .] An anatomical description of, or treatise on, the skin.

Dermatoid adjective [ Greek de`rma , -atos , skin + -oid : confer French dermatoïde . Confer Dermoid .] Resembling skin; skinlike.

Dermatologist noun One who discourses on the skin and its diseases; one versed in dermatology.

Dermatology noun [ Greek de`rma , -atos , skin + -logy : confer French dermatologie .] The science which treats of the skin, its structure, functions, and diseases.

Dermatopathic adjective [ Greek de`rma , -atos , skin + pa`qos suffering.] (Medicine) Of or pertaining to skin diseases, or their cure.

Dermatophyte (dẽr*măt"o*fīt or dẽr"mȧ*to*fīt) noun [ Greek de`rma , -atos , skin + fyto`n plant.] (Medicine) A vegetable parasite, infesting the skin.
[ 1913 Webster]

Dermestes noun [ New Latin , from Greek dermhsth`s ; de`rma skin + root of ... to eat.] (Zoology) A genus of coleopterous insects, the larvæ of which feed animal substances. They are very destructive to dries meats, skins, woolens, and furs. The most common species is D. lardarius , known as the bacon beetle .

Dermestoid adjective [ Dermestes + -oid .] (Zoology) Pertaining to or resembling the genus Dermestes.

The carpet beetle, called the buffalo moth, is a dermestoid beetle.
Pop. Sci. Monthly.

Dermic adjective
1. Relating to the derm or skin.

2. (Anat.) Pertaining to the dermis; dermal.

Underneath each nail the deep or dermic layer of the integument is peculiarly modified.
Huxley.

Dermic remedies (Medicine) , such as act through the skin.

Dermis noun [ New Latin See Derm .] (Anat.) The deep sensitive layer of the skin beneath the scarfskin or epidermis; -- called also true skin , derm , derma , corium , cutis , and enderon . See Skin , and Illust. in Appendix.

Dermobranchiata noun plural [ New Latin ] (Zoology) A group of nudibranch mollusks without special gills.

Dermobranchiate adjective [ Derm + branchiate .] (Zoology) Having the skin modified to serve as a gill.

Dermohæmal adjective (Anat.) Pertaining to, or in relation with, both dermal and hæmal structures; as, the dermohæmal spines or ventral fin rays of fishes.

Dermoid adjective [ Derm + - oid : confer French dermoïde .] Same as Dermatoid .

Dermoid cyst (Medicine) , a cyst containing skin, or structures connected with skin, such as hair.

Dermoneural adjective (Anat.) Pertaining to, or in relation with, both dermal and neural structures; as, the dermoneural spines or dorsal fin rays of fishes. Owen.

Dermopathic adjective (Medicine) Dermatopathic.

Dermophyte noun A dermatophyte.

Dermoptera noun plural [ New Latin , from Greek ... skin + ... wing.]
1. (Zoology) The division of insects which includes the earwigs ( Forticulidæ ).

2. (Zoology) A group of lemuroid mammals having a parachutelike web of skin between the fore and hind legs, of which the colugo ( Galeopithecus ) is the type. See Colugo .

3. (Zoology) An order of Mammalia; the Cheiroptera.

[ Written also Dermaptera , and Dermatoptera .]

Dermopteran noun (Zoology) An insect which has the anterior pair of wings coriaceous, and does not use them in flight, as the earwig.

Dermopteri noun plural [ New Latin ] (Zoology) Same as Dermopterygii .

Dermopterygii noun plural [ New Latin , from Greek ... skin + ... wing, fin, dim. of ... wing.] (Zoology) A group of fishlike animals including the Marsipobranchiata and Leptocardia.

Dermoskeleton noun [ Derm + skeleton .] (Anat.) See Exoskeleton .

Dermostosis noun [ New Latin , from Greek ... skin + ... bone.] (Physiol.) Ossification of the dermis.

Dern noun [ Etymol. uncertain.] A gatepost or doorpost. [ Local Eng.] C. Kingsley.

Dern adjective [ See Dearn , adjective ]
1. Hidden; concealed; secret. [ Obsolete] "Ye must be full dern ." Chaucer.

2. Solitary; sad. [ Obsolete] Dr. H. More.