Chapter 430

Diapase <Xpage=406>

Di"a*pase (?) , n. Same as Diapason . [Obs.]

A tuneful diapase of pleasures. Spenser.

Diapasm <Xpage=406>

Di"a*pasm (?) , n. [L. diapasma , Gr. <?/, fr. <?/; <?/ through + <?/ to sprinkle: cf. F. diapasme .] Powdered aromatic herbs, sometimes made into little balls and strung together. [Obs.]

Diapason <Xpage=406>

Di`a*pa"son (?) , n. [L., fr. Gr. <?/ ( i . e ., <?/ <?/ <?/ the concord of the first and last notes, the octave); <?/ through + <?/, gen. pl. of <?/ all: cf. F. diapason . Cf. Panacea .]

1. (Gr. Mus.) The octave, or interval which includes all the tones of the diatonic scale.

2. Concord, as of notes an octave apart; harmony.

The fair music that all creatures made . . . In perfect diapason . Milton.

3. The entire compass of tones.

Through all the compass of the notes it ran, The diapason closing full in man. Dryden.

4. A standard of pitch; a tuning fork; as, the French normal diapason .

5. One of certain stops in the organ, so called because they extend through the scale of the instrument. They are of several kinds, as open diapason , stopped diapason , double diapason , and the like.

Diapedesis <Xpage=406>

Di`a*pe*de"sis (?) , n. [NL., fr. Gr. <?/ a leaping or oozing through, fr. <?/ to leap through; <?/ through + <?/ to leap.] (Med.) The passage of the corpuscular elements of the blood from the blood vessels into the surrounding tissues, without rupture of the walls of the blood vessels.

Diapente <Xpage=406>

Di`a*pen"te (?) , n. [L., fr. Gr. <?/ a fifth; <?/ through + <?/ five: cf. F. diapente .]

1. (Anc. Mus.) The interval of the fifth.

2. (Med.) A composition of five ingredients.

Diaper <Xpage=406>

Di"a*per (?) , n. [OF. diaspre , diapre , diaspe , sort of figured cloth, It. diaspro jasper, diaspo figured cloth, from L. jaspis a green-colored precious stone. See Jasper .]

1. Any textile fabric (esp. linen or cotton toweling) woven in diaper pattern. See 2.

2. (Fine Arts) Surface decoration of any sort which consists of the constant repetition of one or more simple figures or units of design evenly spaced.

<page="407"> Page 407

3. A towel or napkin for wiping the hands, etc.

Let one attend him with a silver basin, . . . Another bear the ewer, the third a diaper . Shak.

4. An infant's breechcloth.

Diaper <Xpage=407>

Di"a*per (?) , v. t.

1. To ornament with figures, etc., arranged in the pattern called diaper, as cloth in weaving. " Diapered light."

H. Van Laun.

Engarlanded and diapered With in wrought flowers. Tennyson.

2. To put a diaper on (a child).

Diaper <Xpage=407>

Di"a*per , v. i. To draw flowers or figures, as upon cloth. "If you diaper on folds."

Peacham.

Diapering <Xpage=407>

Di"a*per*ing , n. Same as Diaper , n. , 2.

Diaphane <Xpage=407>

Di"a*phane (?) , n. [Cf. F. diaphane diaphanous. See Diaphanous .] A woven silk stuff with transparent and colored figures; diaper work.

Diaphaned <Xpage=407>

Di"a*phaned (?) , a. [Cf. OF. diaphaner to make transparent. See Diaphanous .] Transparent or translucent. [R.]

Diaphaneity <Xpage=407>

Di`a*pha*ne"i*ty (?) , n. [Cf. F. diaphan\'82it\'82 . See Diaphanous .] The quality of being diaphanous; transparency; pellucidness.

Diaphanic <Xpage=407>

Di`a*phan"ic (?) , a. [See Diaphanous .] Having power to transmit light; transparent; diaphanous.

Diaphanie <Xpage=407>

Di*aph"a*nie (?) , n. The art of imitating <?/<?/ined glass with translucent paper.

Diaphanometer <Xpage=407>

Di`a*pha*nom"e*ter (?) , n. [Gr. <?/ transparent + -meter .] An instrument for measuring the transparency of the air.

Diaphanoscope <Xpage=407>

Di`a*phan"o*scope (?) , n. [Gr. <?/ transparent + -scope .] (Photog.) A dark box constructed for viewing transparent pictures, with or without a lens.

Diaphanotype <Xpage=407>

Di`a*phan"o*type (?) , n. [Gr. <?/ transparent + -type .] (Photog.) A colored photograph produced by superimposing a translucent colored positive over a strong uncolored one.

Diaphanous <Xpage=407>

Di*aph"a*nous (?) , a. [Gr. <?/, fr. <?/ to show or shine through; <?/ through + <?/ to show, and in the passive, to shine: cf. F. diaphane . See Phantom , and cf. Diaphane , Diaphanic .] Allowing light to pass through, as porcelain; translucent or transparent; pellucid; clear.

Another cloud in the region of them, light enough to be fantastic and diaphanous . Landor.

Diaphanously <Xpage=407>

Di*aph"a*nous*ly , adv. Translucently.

Diaphemetric <Xpage=407>

Di*aph`e*met"ric (?) , a. [Gr. <?/ through + <?/ touch + <?/ measure.] (Physiol.) Relating to the measurement of the tactile sensibility of parts; as, diaphemetric compasses .

Dunglison.

Diaphonic, Diaphonical <Xpage=407>

Di`a*phon"ic (?) , Di`a*phon"ic*al (?) , a. [Gr. <?/ through + <?/ sound, tone.] Diacoustic.

Diaphonics <Xpage=407>

Di`a*phon"ics (?) , n. The doctrine of refracted sound; diacoustics.

Diaphoresis <Xpage=407>

Di`a*pho*re"sis (?) , n. [L., fr. Gr. <?/, fr. <?/ to carry through, to throw off by perspiration; <?/ through + <?/ to carry.] (Med.) Perspiration, or an increase of perspiration.

Diaphoretic, Diaphoretical <Xpage=407>

Di`a*pho*ret"ic (?) , Di`a*pho*ret"ic*al (?) , a. [L. diaphoreticus , Gr. <?/: cf. F. diaphor\'82tique . See Diaphoresis .] Having the power to increase perspiration.

Diaphoretic <Xpage=407>

Di`a*pho*ret"ic , n. (Med.) A medicine or agent which promotes perspiration.

&hand; Diaphoretics differ from sudorifics ; the former only increase the insensible perspiration, the latter excite the sensible discharge called sweat .

Parr.

Diaphote <Xpage=407>

Di"a*phote (?) , n. [Pref. dia- + Gr. <?/, light.] (Elec.) An instrument designed for transmitting pictures by telegraph.

Fallows.

Diaphragm <Xpage=407>

Di"a*phragm (?) , n. [L. diaphragma , Gr. <?/, fr. <?/ to fence by a partition wall; <?/ through + <?/, <?/, to fence, inclose; prob. akin to L. fareire to stuff: cf. F. diaphragme . See Farce .]

1. A dividing membrane or thin partition, commonly with an opening through it.

2. (Anat.) The muscular and tendinous partition separating the cavity of the chest from that of the abdomen; the midriff.

3. (Zo\'94l.) A calcareous plate which divides the cavity of certain shells into two parts.

4. (Opt.) A plate with an opening, which is generally circular, used in instruments to cut off marginal portions of a beam of light, as at the focus of a telescope.

5. (Mach.) A partition in any compartment, for various purposes.

Diaphragm pump , one in which a flexible diaphragm takes the place of a piston.

Diaphragmatic <Xpage=407>

Di`a*phrag*mat"ic (?) , a. [Cf. F. diaphragmatique .] Pertaining to a diaphragm; as, diaphragmatic respiration; the diaphragmatic arteries and nerves.

Diaphysis <Xpage=407>

Di*aph"y*sis (?) , n. [Gr. <?/ a growing through; <?/ through + <?/ to bring forth.]

1. (Bot.) An abnormal prolongation of the axis of inflorescence.

2. (Anat.) The shaft, or main part, of a bone, which is first ossified.

Diapnoic <Xpage=407>

Di`ap*no"ic (?) , a. [Gr. <?/ outlet for the wind, exhalation, fr. <?/ to blow through; <?/ through + <?/ to blow, breathe: cf. F. diapno\'8bque .] (Med.) Slightly increasing an insensible perspiration; mildly diaphoretic. -- n. A gentle diaphoretic.

Diapophysical <Xpage=407>

Di*ap`o*phys"ic*al (?) , a. (Anat.) Pertaining to a diapophysis.

Diapophysis <Xpage=407>

Di`a*poph"y*sis (?) , n. [NL. See Dia- , and Apophysis .] (Anat.) The dorsal transverse, or tubercular, process of a vertebra. See Vertebra .

Diarchy <Xpage=407>

Di"arch*y (?) , n. [Gr. <?/ = <?/ twice + <?/ to rule.] A form of government in which the supreme power is vested in two persons.

Diarial, Diarian <Xpage=407>

Di*a"ri*al (?) , Di*a"ri*an (?) , a. [See Diary .] Pertaining to a diary; daily.

Diarist <Xpage=407>

Di"a*rist (?) , n. One who keeps a diary.

Diarrhea, Diarrh\'91a <Xpage=407>

Di`ar*rhe"a , Di`ar*rh\'91"a , n. [L. diarrhoea , Gr. <?/, fr. <?/ to flow through; <?/ + <?/ to flow; akin to E. stream . See Stream .] (Med.) A morbidly frequent and profuse discharge of loose or fluid evacuations from the intestines, without tenesmus; a purging or looseness of the bowels; a flux.

Diarrheal, Diarrh</al <Xpage=407>

Di`ar*rhe"al , Di`ar*rh<?/"al a. (Med.) Of or pertaining to diarrhea; like diarrhea.

Diarrhetic, Diarrh\'91tic <Xpage=407>

Di`ar*rhet"ic , Di`ar*rh\'91t"ic (?) , a. (Med.) Producing diarrhea, or a purging.

Diarthrodial <Xpage=407>

Di`ar*thro"di*al (?) , a. (Anat.) Relating to diarthrosis, or movable articulations.

Diarthrosis <Xpage=407>

Di`ar*thro"sis (?) , n. [NL., fr. Gr. <?/, fr. <?/ to joint, articulate; <?/ through, asunder + <?/ to fasten by a joint, <?/ joint.] (Anat.) A form of articulation which admits of considerable motion; a complete joint; abarticulation. See Articulation .

Diary <Xpage=407>

Di"a*ry (?) , n. ; pl. Diaries (#) . [L. diarium , fr. dies day. See Deity .] A register of daily events or transactions; a daily record; a journal; a blank book dated for the record of daily memoranda; as, a diary of the weather; a physician's diary .

Diary <Xpage=407>

Di"a*ry , a. lasting for one day; as, a diary fever . [Obs.] " Diary ague."

Bacon.

Diaspore <Xpage=407>

Di"a*spore (?) , n. [From Gr. <?/ a scattering; <?/ through, asunder + <?/ to sow, scatter like seed: cf. F. diaspore .] (Min.) A hydrate of alumina, often occurring in white lamellar masses with brilliant pearly luster; -- so named on account of its decrepitating when heated before the blowpipe.

Diastase <Xpage=407>

Di"a*stase (?) , n. [Gr. <?/ separation, fr. <?/, <?/ to stand apart; <?/ through + <?/, <?/, to stand, set: cf. F. diastase . Cf. Diastasis .] (Physiol. Chem.) A soluble, nitrogenous ferment, capable of converting starch and dextrin into sugar.

&hand; The name is more particularly applied to that ferment formed during the germination of grain, as in the malting of barley; but it is also occasionally used to designate the amylolytic ferment contained in animal fluids, as in the saliva.

Diastasic <Xpage=407>

Di`a*sta"sic (?) , a. Pertaining to, or consisting of, diastase; as, diastasic ferment .

Diastasis <Xpage=407>

Di*as"ta*sis (?) , n. [NL. See Diastase .] (Surg.) A forcible of bones without fracture.

Diastatic <Xpage=407>

Di`a*stat"ic (?) , a. [Gr. <?/ separative. See Diastase .] (Physiol. Chem.) Relating to diastase; having the properties of diastase; effecting the conversion of starch into sugar.

The influence of acids and alkalies on the diastatic action of saliva. Lauder Brunton.

Diastem <Xpage=407>

Di"a*stem (?) , n. [L. diastema , Gr. <?/, fr. <?/: cf. F. diast\'8ame .] (a) Intervening space; interval. (b) (Anc. Mus.) An interval.

Diastema <Xpage=407>

Di`a*ste"ma (?) , n. [L. See Diastem .] (Anat.) A vacant space, or gap, esp. between teeth in a jaw.

Diaster <Xpage=407>

Di*as"ter (?) , n. [Gr. <?/- = <?/ twice + <?/ star.] (Biol.) A double star; -- applied to the nucleus of a cell, when, during cell division, the loops of the nuclear network separate into two groups, preparatory to the formation of two daughter nuclei. See Karyokinesis .

Diastole <Xpage=407>

Di*as"to*le (?) , n. [L., fr. Gr. <?/, fr. <?/ to put asunder, to separate; <?/ through + <?/ to set, to place.]

1. (Physiol.) The rhythmical expansion or dilatation of the heart and arteries; -- correlative to systole, or contraction.

2. (Gram.) A figure by which a syllable naturally short is made long.

Diastolic <Xpage=407>

Di`as*tol"ic (?) , a. (Physiol.) Of or pertaining to diastole.

Diastyle <Xpage=407>

Di"a*style (?) , n. [L. diastylus , Gr. <?/; <?/ through, asunder + <?/ pillar, column: cf. F. diastyle .] (Arch.) See under Intercolumniation .

Diatessaron <Xpage=407>

Di`a*tes"sa*ron (?) , n. [L., fr. Gr. <?/ (sc. <?/); <?/ through + <?/, gen. of <?/ four (sc. <?/.).]

1. (Anc. Mus.) The interval of a fourth.

2. (Theol.) A continuous narrative arranged from the first four books of the New Testament.

3. An electuary compounded of four medicines.

Diathermal <Xpage=407>

Di`a*ther"mal (?) , a. [Gr. <?/ thoroughly warm; <?/ through + <?/ warm, hot. Cf. Diathermous .] Freely permeable by radiant heat.

Diathermancy, Diathermaneity <Xpage=407>

Di`a*ther"man*cy (?) , Di`a*ther`ma*ne"i*ty (?) , n. [See Diathermanous .] The property of transmitting radiant heat; the quality of being diathermous.

Melloni.

Diathermanism <Xpage=407>

Di`a*ther"ma*nism (?) , n. The doctrine or the phenomena of the transmission of radiant heat.

Nichol.

Diathermanous <Xpage=407>

Di`a*ther"ma*nous (?) , a. [Gr. <?/ to warm through; <?/ through + <?/ to warm, <?/ warm.] Having the property of transmitting radiant heat; diathermal; -- opposed to athermanous .

Diathermic <Xpage=407>

Di`a*ther"mic (?) , a. Affording a free passage to heat; as, diathermic substances .

Melloni.

Diathermometer <Xpage=407>

Di`a*ther*mom"e*ter (?) , n. [Gr. <?/ warm + -meter . See Diathermal .] (Physics) An instrument for examining the thermal resistance or heat-conducting power of liquids.

Diathermous <Xpage=407>

Di`a*ther"mous (?) , a. Same as Diathermal .

Diathesis <Xpage=407>

Di*ath"e*sis (?) , n. [NL., fr. Gr. <?/, fr. <?/ to place separately, arrange; <?/ through, asunder + <?/ to place, put.] (Med.) Bodily condition or constitution, esp. a morbid habit which predisposes to a particular disease, or class of diseases.

Diathetic <Xpage=407>

Di`a*thet"ic (?) , a. Pertaining to, or dependent on, a diathesis or special constitution of the body; as, diathetic disease .

Diatom <Xpage=407>

Di"a*tom (?) , n. [Gr. <?/ cut in two. See Diatomous .]

1. (Bot.) One of the Diatomace\'91 , a family of minute unicellular Alg\'91 having a siliceous covering of great delicacy, each individual multiplying by spontaneous division. By some authors diatoms are called Bacillari\'91 , but this word is not in general use.

2. A particle or atom endowed with the vital principle.

The individual is nothing. He is no more than the diatom , the bit of protoplasm. Mrs. E. Lynn Linton.

Diatomic <Xpage=407>

Di`a*tom"ic (?) , a. [Pref. di- + atomic .] (Chem.) (a) Containing two atoms. (b) Having two replaceable atoms or radicals.

Diatomous <Xpage=407>

Di*at"o*mous (?) , a. [Gr. <?/ cut through, fr. <?/ to cut through; <?/ through + <?/ to cut. Cf. Diatom .] (Min.) Having a single, distinct, diagonal cleavage; -- said of crystals.

Mohs.

Diatonic <Xpage=407>

Di`a*ton"ic (?) , a. [L. diatonicus , diatonus , Gr. <?/, <?/, fr. <?/ to stretch out; <?/ through + <?/ to stretch: cf. F. diatonique . See Tone .] (Mus.) Pertaining to the scale of eight tones, the eighth of which is the octave of the first.

Diatonic scale (Mus.) , a scale consisting of eight sounds with seven intervals, of which two are semitones and five are whole tones; a modern major or minor scale, as distinguished from the chromatic scale.

Diatonically <Xpage=407>

Di`a*ton"ic*al*ly (?) , adv. In a diatonic manner.

Diatribe <Xpage=407>

Di"a*tribe (?; 277) , n. [L. diatriba a learned discussion, Gr. <?/, prop., a wearing away of time, fr. <?/ to rub away, spend time; <?/ through + <?/ to rub: cf. L. terere , F. trite : cf. F. diatribe .] A prolonged or exhaustive discussion; especially, an acrimonious or invective harangue; a strain of abusive or railing language; a philippic.

The ephemeral diatribe of a faction. John Morley.

Diatribist <Xpage=407>

Di*at"ri*bist (?) , n. One who makes a diatribe or diatribes.

Diatryma <Xpage=407>

Di`a*try"ma (?) , n. [NL., from Gr. <?/ through + <?/ hole.] (Paleon.) An extinct eocene bird from New Mexico, larger than the ostrich.

Diazeuctic, Diazeutic <Xpage=407>

Di`a*zeuc"tic (?) , Di`a*zeu"tic (?) , a. [Gr. <?/ disjunctive, fr. <?/ to disjoin; <?/ through, asunder + <?/ to join, yoke.] (Anc. Mus.) Disjoining two fourths; as, the diazeutic tone, which, like that from F to G in modern music, lay between two fourths, and, being joined to either, made a fifth . [Obs.]

Diazo- <Xpage=407>

Di*az"o- (<?/) . [Pref. di- + azo- ] (Chem.) A combining form (also used adjectively), meaning pertaining to , or derived from , a series of compounds containing a radical of two nitrogen atoms , united usually to an aromatic radical; as, diazo- benzene, C6H5.N2.OH .

&hand; Diazo compounds are in general unstable, but are of great importance in recent organic chemistry. They are obtained by a partial reduction of the salts of certain amido compounds.

Diazo reactions (Chem.) , a series of reactions whereby diazo compounds are employed in substitution. These reactions are of great importance in organic chemistry.

Diazotize <Xpage=407>

Di*az"o*tize (?) , v. t. (Chem.) To subject to such reactions or processes that diazo compounds, or their derivatives, shall be produced by chemical exchange or substitution.

Dib <Xpage=407>

Dib (?) , v. i. To dip. [Prov. Eng.]

Walton.

Dib <Xpage=407>

Dib , n.

1. One of the small bones in the knee joints of sheep uniting the bones above and below the joints.