Chapter 34

The garden pool's dark surface . . . Breaks into dimples small and bright.

Wordsworth.

Dim"ple, v. i. [imp. & p. p. Dimpled (?); p. pr. & vb. n. Dimpling (?).] To form dimples; to sink into depressions or little inequalities.

And smiling eddies dimpled on the main.

Dryden.

Dim"ple, v. t. To mark with dimples or dimplelike depressions. Shak.

Dim"ple*ment (?), n. The state of being dimpled, or marked with gentle depressions. [R.]

The ground's most gentle dimplement.

Mrs. Browning.

Dim"ply (?), a. Full of dimples, or small depressions; dimpled; as, the dimply pool. Thomson.

Dim"-sight`ed (?), a. Having dim sight; lacking perception. -- Dim"-sight`ed*ness, n.

||Dim"y*a (?), Dim`y*a"ri*a (&?;), n. pl. [NL., fr. Gr. &?; = &?; + &?; to close.] (Zoöl.) An order of lamellibranchiate mollusks having an anterior and posterior adductor muscle, as the common clam. See Bivalve.

Dim`y*a"ri*an (?), a. (Zoöl.) Like or pertaining to the Dimya. -- n. One of the Dimya.

Dim"y*a*ry (?), a. & n. (Zoöl.) Same as Dimyarian.

Din (?), n. [AS. dyne, dyn; akin to Icel. dynr, and to AS. dynian to resound, Icel. dynja to pour down like hail or rain; cf. Skr. dhuni roaring, a torrent, dhvan to sound. Cf. Dun to ask payment.] Loud, confused, harsh noise; a loud, continuous, rattling or clanging sound; clamor; roar.

Think you a little din can daunt mine ears?

Shak.

He knew the battle's din afar.

Sir W. Scott.

The dust and din and steam of town.

Tennyson.

Din, v. t. [imp. & p. p. Dinned (?); p. pr. & vb. n. Dinning.] [AS. dynian. See Din, n.] 1. To strike with confused or clanging sound; to stun with loud and continued noise; to harass with clamor; as, to din the ears with cries.

2. To utter with a din; to repeat noisily; to ding.

This hath been often dinned in my ears.

Swift.

To din into, to fix in the mind of another by frequent and noisy repetitions. Sir W. Scott.

Din, v. i. To sound with a din; a ding.

The gay viol dinning in the dale.

A. Seward.

di*naph"thyl (?), n. [Pref. di- + naphthylene.] (Chem.) A colorless, crystalline hydrocarbon, C20H14, obtained from naphthylene, and consisting of a doubled naphthylene radical.

Di"nar (d"nr or d*när"), n. [Ar. dnr, from Gr. dhna`rion, fr. L. denarius. See Denier.] 1. A petty money of accounts of Persia.

2. An ancient gold coin of the East.

di"nar*chy (?), n. See Diarchy.

Dine (dn), v. i. [imp. & p. p. Dined (dnd); p. pr. & vb. n. Dining.] [F. dîner, OF. disner, LL. disnare, contr. fr. an assumed disjunare; dis- + an assumed junare (OF. juner) to fast, for L. jejunare, fr. jejunus fasting. See Jejune, and cf. Dinner, D&?;jeuner.] To eat the principal regular meal of the day; to take dinner.

Now can I break my fast, dine, sup, and sleep.

Shak.

To dine with Duke Humphrey, to go without dinner; -- a phrase common in Elizabethan literature, said to be from the practice of the poor gentry, who beguiled the dinner hour by a promenade near the tomb of Humphrey, Duke of Gloucester, in Old Saint Paul's.

Dine, v. t. 1. To give a dinner to; to furnish with the chief meal; to feed; as, to dine a hundred men.

A table massive enough to have dined Johnnie Armstrong and his merry men.

Sir W. Scott.

2. To dine upon; to have to eat. [Obs.] "What will ye dine." Chaucer.

Din"er (?), n. One who dines.

Din"er-out` (?), n. One who often takes his dinner away from home, or in company.

A brilliant diner-out, though but a curate.

Byron.

Di*net"ic*al (?), a. [Gr. &?; to whirl round.] Revolving on an axis. [Obs.] Sir T. Browne.

Ding (?), v. t. [imp. & p. p. Dinged (?), Dang (Obs.), or Dung (Obs.); p. pr. & vb. n. Dinging.] [OE. dingen, dengen; akin to AS. dencgan to knock, Icel. dengja to beat, hammer, Sw. dänga, G. dengeln.] 1. To dash; to throw violently. [Obs.]

To ding the book a coit's distance from him.

Milton.

2. To cause to sound or ring.

To ding (anything) in one's ears, to impress one by noisy repetition, as if by hammering.

Ding, v. i. 1. To strike; to thump; to pound. [Obs.]

Diken, or delven, or dingen upon sheaves.

Piers Plowman.

2. To sound, as a bell; to ring; to clang.

The fretful tinkling of the convent bell evermore dinging among the mountain echoes.

W. Irving.

3. To talk with vehemence, importunity, or reiteration; to bluster. [Low]

Ding, n. A thump or stroke, especially of a bell.

Ding"dong` (?), n. [See Ding.] 1. The sound of, or as of, repeated strokes on a metallic body, as a bell; a repeated and monotonous sound.

2. (Horol.) An attachment to a clock by which the quarter hours are struck upon bells of different tones.

{ Din"gey (?), Din"gy, Din"ghy }, n. [Bengalee dingi.] 1. A kind of boat used in the East Indies. [Written also dinghey.] Malcom.

2. A ship's smallest boat.

Din"gi*ly (?), adv. In a dingy manner.

Din"gi*ness, n. Quality of being dingy; a dusky hue.

Din"gle (?), n. [Of uncertain origin: cf. AS. ding prison; or perh. akin to dimble.] A narrow dale; a small dell; a small, secluded, and embowered valley.

Din"gle-dan`gle (?), adv. In a dangling manner.

Din"go (?), n. (Zoöl.) A wild dog found in Australia, but supposed to have introduced at a very early period. It has a wolflike face, bushy tail, and a reddish brown color.

Ding"thrift` (?), n. A spendthrift. [Obs.]

Wilt thou, therefore, a drunkard be, A dingthrift and a knave?

Drant.

Din"gy (?), a. [Compar. Dingier (?); superl. Dingiest.] [Prob. fr. dung. Cf. Dungy.] Soiled; sullied; of a dark or dusky color; dark brown; dirty. "Scraps of dingy paper." Macaulay.

||Di*nich"thys (?), n. [NL., fr. Gr. &?; terrible + &?; fish.] (Paleon.) A genus of large extinct Devonian ganoid fishes. In some parts of Ohio remains of the Dinichthys are abundant, indicating animals twenty feet in length.

Din"ing (?), n. & a. from Dine, a.

Used either adjectively or as the first part of a compound; as, dining hall or dining-hall, dining room, dining table, etc.

Dink (?), a. [Etymol. uncertain.] Trim; neat. [Scot.] Burns. -- Dink"ly, adv.

Dink, v. t. To deck; -- often with out or up. [Scot.]

Din"mont (?), n. (Zoöl.) A wether sheep between one and two years old. [Scot.]

Din"ner (?), n. [F. dîner, fr. dîner to dine. See Dine.] 1. The principal meal of the day, eaten by most people about midday, but by many (especially in cities) at a later hour.

2. An entertainment; a feast.

A grand political dinner.

Tennyson.

Dinner is much used, in an obvious sense, either adjectively or as the first part of a compound; as, dinner time, or dinner-time, dinner bell, dinner hour, etc.

Din"ner*less, a. Having no dinner. Fuller.

Din"ner*ly, a. Of or pertaining to dinner. [R.]

The dinnerly officer.

Copley.

||Di*noc"e*ras (?), n. [NL., fr. Gr. &?; terrible + &?;, &?;, horn.] (Paleon.) A genus of large extinct Eocene mammals from Wyoming; -- called also Uintatherium. See Illustration in Appendix.

They were herbivorous, and remarkable for three pairs of hornlike protuberances on the skull. The males were armed with a pair of powerful canine tusks.

||Di*nor"nis (?), n. [NL., fr. Gr. &?; terrible + &?; bird.] (Paleon.) A genus of extinct, ostrichlike birds of gigantic size, which formerly inhabited New Zealand. See Moa. [Written also Deinornis.]

{ Di"no*saur (?), Di`no*sau"ri*an (?), } n. [Gr. &?; terrible + &?; lizard.] (Paleon.) One of the Dinosauria. [Written also deinosaur, and deinosaurian.]

||Di`no*sau"ri*a (?), n. pl. [NL., fr. Gr. &?; terrible + &?; lizard.] (Paleon.) An order of extinct mesozoic reptiles, mostly of large size (whence the name). Notwithstanding their size, they present birdlike characters in the skeleton, esp. in the pelvis and hind limbs. Some walked on their three-toed hind feet, thus producing the large "bird tracks," so- called, of mesozoic sandstones; others were five-toed and quadrupedal. See Illust. of Compsognathus, also Illustration of Dinosaur in Appendix.

{ Di"no*there (?), ||Di`no*the"ri*um (?), } n. [NL. dinotherium, fr. Gr. deino`s terrible + qhri`on beast.] (Paleon.) A large extinct proboscidean mammal from the miocene beds of Europe and Asia. It is remarkable fora pair of tusks directed downward from the decurved apex of the lower jaw.

Din*ox"ide (?), n. (Chem.) Same as Dioxide.

Din"some (?), a. Full of din. [Scot.] Burns.

Dint (?), n. [OE. dint, dent, dunt, a blow, AS. dynt; akin to Icel. dyntr a dint, dynta to dint, and perh. to L. fendere (in composition). Cf. 1st Dent, Defend.] 1. A blow; a stroke. [Obs.] "Mortal dint." Milton. "Like thunder's dint." Fairfax.

2. The mark left by a blow; an indentation or impression made by violence; a dent. Dryden.

Every dint a sword had beaten in it [the shield].

Tennyson.

3. Force; power; -- esp. in the phrase by dint of.

Now you weep; and, I perceive, you feel The dint of pity.

Shak.

It was by dint of passing strength That he moved the massy stone at length.

Sir W. Scott.

Dint, v. t. [imp. & p. p. Dinted; p. pr. & vb. n. Dinting.] To make a mark or cavity on or in, by a blow or by pressure; to dent. Donne. Tennyson.

Di*nu`mer*a"tion (?), n. [L. dinumeratio; di- = dis- + numerare to count, fr. numerus number.] Enumeration. [Obs.] Bullokar.

Di*oc"e*san (?; 277), a. [LL. dioecesanus: cf. F. diocésain.] Of or pertaining to a diocese; as, diocesan missions.

Di*oc"e*san, n. 1. A bishop, viewed in relation to his diocese; as, the diocesan of New York.

2. pl. The clergy or the people of a diocese. Strype.

Di"o*cese (?), n.; pl. Dioceses (#). [OE. diocise, OF. diocise, F. diocése, L. dioecesis, fr. Gr. &?; housekeeping, administration, a province, a diocese, fr. &?; to keep house, manage; dia` through + &?; to manage a household, &?; a house. See Economy.] (Eccl.) The circuit or extent of a bishop's jurisdiction; the district in which a bishop exercises his ecclesiastical authority. [Frequently, but improperly, spelt diocess.]

Di`o*ce"se*ner (?), n. One who belongs to a diocese. [Obs.] Bacon.

Di"o*don (?), n. [Gr. di- = di`s- twice + 'odoy`s, 'odo`ntos, a tooth: cf. F. diodon.] 1. (Zoöl.) A genus of spinose, plectognath fishes, having the teeth of each jaw united into a single beaklike plate. They are able to inflate the body by taking in air or water, and, hence, are called globefishes, swellfishes, etc. Called also porcupine fishes, and sea hedgehogs.

2. (Zoöl.) A genus of whales.

Di"o*dont (?), a. (Zoöl.) Like or pertaining to the genus Diodon. -- n. A fish of the genus Diodon, or an allied genus.

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||Di*œ"ci*a (d*"sh*), n. pl. [NL., fr. Gr. di = di`s twice + o'i^kos a house.] 1. (Bot.) A Linnæan class of plants having the stamens and pistils on different plants.

2. (Zoöl.) A subclass of gastropod mollusks in which the sexes are separate. It includes most of the large marine species, like the conchs, cones, and cowries.

{ Di*œ"cian (?), Di*œ"cious (?), } a. (Biol.) Having the sexes in two separate individuals; -- applied to plants in which the female flowers occur on one individual and the male flowers on another of the same species, and to animals in which the ovum is produced by one individual and the sperm cell by another; -- opposed to monœcious.

Di*œ"cious*ly, adv. (Biol.) In a diœcious manner.

Diœciously hermaphrodite (Bot.), having flowers structurally perfect, but practically diœcious, -- those on one plant producing no pollen, and those on another no ovules.

Di*œ"cious*ness, n. (Biol.) The state or quality of being diœcious.

Di*œ"cism (?), n. (Biol.) The condition of being diœcious.

Di*og"e*nes (?), n. A Greek Cynic philosopher (412?-323 B. C.) who lived much in Athens and was distinguished for contempt of the common aims and conditions of life, and for sharp, caustic sayings.

Diogenes' crab (Zoöl.), a species of terrestrial hermit crabs (Cenobita Diogenes), abundant in the West Indies and often destructive to crops. -- Diogenes' tub, the tub which the philosopher Diogenes is said to have carried about with him as his house, in which he lived.

Di*oi"cous (?), a. See Diœcious.

||Di*om`e*de"a (?), n. [NL.] (Zoöl.) A genus of large sea birds, including the albatross. See Albatross.

||Di`o*næ"a (?), n. [NL., fr. Gr. &?; a name of Aphrodite.] (Bot.) An insectivorous plant. See Venus's flytrap.

Di`o*ny"sian (?), a. Relating to Dionysius, a monk of the 6th century; as, the Dionysian, or Christian, era.

Dionysian period, a period of 532 years, depending on the cycle of the sun, or 28 years, and the cycle of the moon, or 19 years; -- sometimes called the Greek paschal cycle, or Victorian period.

Di`o*phan"tine (?), a. Originated or taught by Diophantus, the Greek writer on algebra.

Diophantine analysis (Alg.), that branch of indeterminate analysis which has for its object the discovery of rational values that satisfy given equations containing squares or cubes; as, for example, to find values of x and y which make x2 + y2 an exact square.

Di*op"side (?), n. [Gr. di- = di`s- twice + &?; a sight, fr. the root of &?; I shall see: cf. F. diopside.] (Min.) A crystallized variety of pyroxene, of a clear, grayish green color; mussite.

Di*op"tase (?), n. [Gr. &?; = dia` through + &?; to see: cf. F. dioptase.] (Min.) A hydrous silicate of copper, occurring in emerald-green crystals.

{ Di*op"ter (?), ||Di*op"tra (?), } n. [L. dioptra, fr. Gr. &?;. See 2d Dioptric.] An optical instrument, invented by Hipparchus, for taking altitudes, leveling, etc.

||Di*op"tre (?), n. [F. See 2d Dioptric.] (Optics) A unit employed by oculists in numbering glasses according to the metric system; a refractive power equal to that of a glass whose principal focal distance is one meter.

Di*op"tric (?), a. (Optics) Of or pertaining to the dioptre, or to the metric system of numbering glasses. -- n. A dioptre. See Dioptre.

{ Di*op"tric (?), Di*op"tric*al (?), } a. [Gr. &?; belonging to the use of the &?;; &?; = dia` through + the root of &?; I shall see: cf. F. dioptrique.] Of or pertaining to dioptrics; assisting vision by means of the refraction of light; refractive; as, the dioptric system; a dioptric glass or telescope. "Dioptrical principles." Nichol.

Dioptric curve (Geom.), a Cartesian oval. See under Cartesian.

Di*op"trics (?), n. [Gr. &?; &?;: cf. F. dioptrique.] (Optics) The science of the refraction of light; that part of geometrical optics which treats of the laws of the refraction of light in passing from one medium into another, or through different mediums, as air, water, or glass, and esp. through different lenses; -- distinguished from catoptrics, which refers to reflected light.

Di*op"try (?), n. (Optics) A dioptre.

Di`o*ra"ma (?), n. [Gr. &?; to see through; &?; = dia` through + &?; to see; cf. &?; that which is seen, a sight: cf. F. diorama. Cf. Panorama.] 1. A mode of scenic representation, invented by Daguerre and Bouton, in which a painting is seen from a distance through a large opening. By a combination of transparent and opaque painting, and of transmitted and reflected light, and by contrivances such as screens and shutters, much diversity of scenic effect is produced.

2. A building used for such an exhibition.

Di`o*ram"ic (?), a. Pertaining to a diorama.

Di"o*rism (?), n. [Gr. &?;, fr. &?; to distinguish; &?; = dia` through + &?; to divide from, fr. &?; a boundary.] Definition; logical direction. [Obs.] Dr. H. More.

Di`o*ris"tic (?), a. [Gr. &?;.] Distinguishing; distinctive; defining. [R.] -- Di`o*ris"tic*al*ly (#), adv. [R.] Dr. H. More.

Di"o*rite (?), n. [Cf. F. diorite. See Diorism.] (Min.) An igneous, crystalline in structure, consisting essentially of a triclinic feldspar and hornblende. It includes part of what was called greenstone.

Di`o*rit"ic (?), a. Containing diorite.

Di`or*thot"ic (?), a. [Gr. &?;; &?; = &?; + &?; to set straight.] Relating to the correcting or straightening out of something; corrective.

||Di`os*co"re*a (?), n. [NL. Named after Dioscorides the Greek physician.] (Bot.) A genus of plants. See Yam.

||Di*o"ta (?), n. [L., fr. Gr. &?; two- handled; di- = di`s- twice + &?;, &?;, ear, handle.] (Rom. Antiq.) A vase or drinking cup having two handles or ears.

Di*ox"ide (?; 104), n. [Pref. di- + oxide.] (Chem.) (a) An oxide containing two atoms of oxygen in each molecule; binoxide. (b) An oxide containing but one atom or equivalent of oxygen to two of a metal; a suboxide. [Obs.]

Carbon dioxide. See Carbonic acid, under Carbonic.

Di`ox*in"dol (?), n. [Pref. di- + oxygen + indol.] (Chem.) A white, crystalline, nitrogenous substance obtained by the reduction of isatin. It is a member of the indol series; -- hence its name.

Dip (?), v. t. [imp. & p. p. Dipped (?) or Dipt (&?;); p. pr. & vb. n. Dipping.] [OE. dippen, duppen, AS. dyppan; akin to Dan. dyppe, Sw. doppa, and to AS. d&?;pan to baptize, OS. d&?;pian, D. doopen, G. taufen, Sw. döpa, Goth. daupjan, Lith. dubus deep, hollow, OSlav. dupl&?; hollow, and to E. dive. Cf. Deep, Dive.] 1. To plunge or immerse; especially, to put for a moment into a liquid; to insert into a fluid and withdraw again.

The priest shall dip his finger in the blood.

Lev. iv. 6.

[Wat'ry fowl] now dip their pinions in the briny deep.

Pope.

While the prime swallow dips his wing.

Tennyson.

2. To immerse for baptism; to baptize by immersion. Book of Common Prayer. Fuller.

3. To wet, as if by immersing; to moisten. [Poetic]

A cold shuddering dew Dips me all o'er.

Milton.

4. To plunge or engage thoroughly in any affair.

He was . . . dipt in the rebellion of the Commons.

Dryden.

5. To take out, by dipping a dipper, ladle, or other receptacle, into a fluid and removing a part; -- often with out; as, to dip water from a boiler; to dip out water.

6. To engage as a pledge; to mortgage. [Obs.]

Live on the use and never dip thy lands.

Dryden.

Dipped candle, a candle made by repeatedly dipping a wick in melted tallow. -- To dip snuff, to take snuff by rubbing it on the gums and teeth. [Southern U. S.] -- To dip the colors (Naut.), to lower the colors and return them to place; -- a form of naval salute.

Dip, v. i. 1. To immerse one's self; to become plunged in a liquid; to sink.

The sun's rim dips; the stars rush out.

Coleridge.

2. To perform the action of plunging some receptacle, as a dipper, ladle. etc.; into a liquid or a soft substance and removing a part.

Whoever dips too deep will find death in the pot.

L'Estrange.

3. To pierce; to penetrate; -- followed by in or into.

When I dipt into the future.

Tennyson.

4. To enter slightly or cursorily; to engage one's self desultorily or by the way; to partake limitedly; -- followed by in or into. "Dipped into a multitude of books." Macaulay.

5. To incline downward from the plane of the horizon; as, strata of rock dip.

6. To dip snuff. [Southern U.S.]

Dip, n. 1. The action of dipping or plunging for a moment into a liquid. "The dip of oars in unison." Glover.

2. Inclination downward; direction below a horizontal line; slope; pitch.

3. A liquid, as a sauce or gravy, served at table with a ladle or spoon. [Local, U.S.] Bartlett.

4. A dipped candle. [Colloq.] Marryat.

Dip of the horizon (Astron.), the angular depression of the seen or visible horizon below the true or natural horizon; the angle at the eye of an observer between a horizontal line and a tangent drawn from the eye to the surface of the ocean. -- Dip of the needle, or Magnetic dip, the angle formed, in a vertical plane, by a freely suspended magnetic needle, or the line of magnetic force, with a horizontal line; -- called also inclination. -- Dip of a stratum (Geol.), its greatest angle of inclination to the horizon, or that of a line perpendicular to its direction or strike; -- called also the pitch.

Di*pas"chal (?), a. [Pref. di- + paschal.] Including two passovers. Carpenter.

Dip"chick` (?), n. (Zoöl.) See Dabchick.

Di*pet"al*ous (?), a. [Pref. di- + petalous.] (Bot.) Having two petals; two- petaled.

Di*phe"nyl (?), n. [Pref. di- + phenyl.] (Chem.) A white crystalline substance, C6H5.C6H5, obtained by leading benzene through a heated iron tube. It consists of two benzene or phenyl radicals united.

Diph*the"ri*a (?), n. [NL., fr. Gr. &?; leather (hence taken in the sense of membrane): cf. &?; to make soft, L. depsere to knead.] (Med.) A very dangerous contagious disease in which the air passages, and especially the throat, become coated with a false membrane, produced by the solidification of an inflammatory exudation. Cf. Group.

{ Diph*the"ri*al (?), Diph*ther"ic (?), } a. Relating to diphtheria; diphtheritic.

Diph`the*rit"ic (?), a. (Med.) 1. Pertaining to, or connected with, diphtheria.

2. Having characteristics resembling those of diphtheria; as, diphtheritic inflammation of the bladder.

Diph"thong (?; 115, 277), n. [L. diphthongus, Gr. &?;; di- = di`s- twice + &?; voice, sound, fr. &?; to utter a sound: cf. F. diphthongue.] (Orthoëpy) (a) A coalition or union of two vowel sounds pronounced in one syllable; as, ou in out, oi in noise; -- called a proper diphthong. (b) A vowel digraph; a union of two vowels in the same syllable, only one of them being sounded; as, ai in rain, eo in people; -- called an improper diphthong.

Diph"thong, v. t. To form or pronounce as a diphthong; diphthongize. [R.]

Diph*thon"gal (?; 115), a. Relating or belonging to a diphthong; having the nature of a diphthong. -- Diph*thon"gal*ly, adv.

Diph*thon"gal*ize (?; 115), v. t. To make into a diphthong; to pronounce as a diphthong.

Diph`thon*ga"tion (?), n. See Diphthongization.

Diph*thong"ic (?; 115), a. Of the nature of diphthong; diphthongal. H. Sweet.

Diph`thong*i*za"tion (?), n. The act of changing into a diphthong. H. Sweet.

Diph"thong*ize (?), v. t. & i. To change into a diphthong, as by affixing another vowel to a simple vowel. "The diphthongized long vowels." H. Sweet.

Diph`y*cer"cal (?), a. [Gr. difyh`s double (di- = di`s- twice + fy`ein to produce) + ke`rkos tail.] (Anat.) Having the tail fin divided into two equal parts by the notochord, or end of the vertebral column; protocercal. See Protocercal.

Diph`y*gen"ic (-jn"k), a. [Gr. difyh`s of double form + - genic.] (Zoöl.) Having two modes of embryonic development. [1913 Webster]

Diph"yl*lous (df"l*ls or d*fl"-), a. [Gr. di- = di`s- twice + fy`llon leaf: cf. F. diphylle.] (Bot.) Having two leaves, as a calyx, etc. [1913 Webster]

Diph"y*o*dont (?), a. [Gr. &?; double (di- = di`s- twice + &?; to produce) + 'odoy`s, 'odo`ntos, tooth.] (Anat.) Having two successive sets of teeth (deciduous and permanent), one succeeding the other; as, a diphyodont mammal; diphyodont dentition; -- opposed to monophyodont. -- n. An animal having two successive sets of teeth.

Diph`y*o*zo"oid (?), n. [Gr. &?; of double from + E. zooid.] (Zoöl.) One of the free-swimming sexual zooids of Siphonophora.

Di*pla"nar (?), a. [Pref. di- + plane.] (Math.) Of or pertaining to two planes.

Di*plei"do*scope (?), n. [Gr. &?; double + &?; image + -scope.] (Astron.) An instrument for determining the time of apparent noon. It consists of two mirrors and a plane glass disposed in the form of a prism, so that, by the reflections of the sun's rays from their surfaces, two images are presented to the eye, moving in opposite directions, and coinciding at the instant the sun's center is on the meridian.

Dip`lo*blas"tic (?), a. [Gr. &?; doublet + -blast + -ic.] (Biol.) Characterizing the ovum when it has two primary germinal layers.

Dip`lo*car"di*ac (?), a. [Gr. &?; double + E. cardiac.] (Anat.) Having the heart completely divided or double, one side systemic, the other pulmonary.

||Dip`lo*coc"cus (?), n.; pl. Diplococci (#). [NL., fr. Gr. diplo`os twofold + ko`kkos grain, seed.] (Biol.) A form of micrococcus in which cocci are united in a binary manner. See Micrococcus.

||Dip"lo*ë (?), n. [NL., fr. Gr. &?; fold, fr. &?; twofold, double.] (Anat.) The soft, spongy, or cancellated substance between the plates of the skull.

Dip`lo*et"ic (?), a. (Anat.) Diploic.