Webster's Dictionary, 1913

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Diploic adjective (Anat.) Of or pertaining to the diploë.

Diploid noun [ Greek ... twofold + -oid .] (Crystallog.) A solid bounded by twenty- four similar quadrilateral faces. It is a hemihedral form of the hexoctahedron.

Diploma noun ; plural Diplomas . [ Latin , from Greek ..., from ... to double, from ... twofold. See Double .] A letter or writing, usually under seal, conferring some privilege, honor, or power; a document bearing record of a degree conferred by a literary society or educational institution.

Diplomacy noun [ French diplomatie . This word, like supremacy , retains the accent of its original. See Diploma .]
1. The art and practice of conducting negotiations between nations (particularly in securing treaties), including the methods and forms usually employed.

2. Dexterity or skill in securing advantages; tact.

3. The body of ministers or envoys resident at a court; the diplomatic body. [ R.] Burke.

Diplomat, Diplomate noun [ French diplomate .] A diplomatist.

Diplomate transitive verb To invest with a title or privilege by diploma. [ R.] Wood.

Diplomatial adjective Diplomatic. [ R.]

Diplomatic noun A minister, official agent, or envoy to a foreign court; a diplomatist.

Diplomatic, Diplomatical adjective [ Confer diplomatique .]
1. Pertaining to diplomacy; relating to the foreign ministers at a court, who are called the diplomatic body .

2. Characterized by tact and shrewdness; dexterous; artful; as, diplomatic management.

3. Pertaining to diplomatics; paleographic. Astle.

Diplomatically adverb According to the rules of diplomacy; in the manner of a diplomatist; artfully.

Diplomatics noun The science of diplomas, or the art of deciphering ancient writings, and determining their age, authenticity, etc.; paleography.

Diplomatism noun Diplomacy. [ R.]

Diplomatist noun [ Confer French diplomatiste a student of diplomatics.] A person employed in, or skilled in, diplomacy; a diplomat.

In ability, Avaux had no superior among the numerous able diplomatists whom his country then possessed.
Macaulay.

Diplopia, Diplopy noun [ New Latin diplopia , from Greek ... double + the root of ... sight: confer French diplopie .] (Medicine) The act or state of seeing double.

» In crossed or heteronymous diplopia the image seen by the right eye is upon the left hand, and that seen by the left eye is upon the right hand. In homonymous diplopia the image seen by the right eye is on the right side, that by the left eye on the left side. In vertical diplopia one image stands above the other.

Diplopod noun (Zoology) One of the Diplopoda.

Diplopoda noun plural [ Greek ... double + -poda .] (Zoology) An order of myriapods having two pairs of legs on each segment; the Chilognatha.

Diplostemonous adjective [ Greek ... double + ... the warp, a thread.] (Botany) Having twice as many stamens as petals, as the geranium. R. Brown.

Diplostemony noun (Botany) The condition of being diplostemonous.

Dipneumona noun plural [ New Latin , from Greek ... = ... lung.] (Zoology) A group of spiders having only two lunglike organs. [ Written also Dipneumones .]

Dipnoi noun plural [ New Latin , from Greek ... ... with two breathing apertures; di- = di`s- twice + ... breath.] (Zoology) A group of ganoid fishes, including the living genera Ceratodus and Lepidosiren , which present the closest approximation to the Amphibia. The air bladder acts as a lung, and the nostrils open inside the mouth. See Ceratodus , and Illustration in Appendix.

Dipody noun ; plural Dipodies . [ Greek ..., from ... two-footed; di- = di`s- twice + ..., ..., foot.] (Pros.) Two metrical feet taken together, or included in one measure. Hadley.

Trochaic, iambic, and anapestic verses . . . are measured by dipodies .
W. W. Goodwin.

Dipolar adjective [ Pre. di- + polar . Confer Bipolar .] Having two poles, as a magnetic bar.

Dippel's oil (Chemistry) [ From the name of the inventor.] See Bone oil , under Bone .

Dipper noun
1. One who, or that which, dips; especially, a vessel used to dip water or other liquid; a ladle.

2. (Zoology) (a) A small grebe; the dabchick. (b) The buffel duck. (c) The water ouzel ( Cinolus aquaticus ) of Europe. (d) The American dipper or ouzel ( Cinclus Mexicanus ).

The Dipper (Astron.) , the seven principal stars in the constellation of the Great Bear; popularly so called from their arrangement in the form of a dipper; -- called also Charles's Wain . See Ursa Major , under Ursa .

Dipping noun
1. The act or process of immersing.

2. The act of inclining downward.

3. The act of lifting or moving a liquid with a dipper, ladle, or the like.

4. The process of cleaning or brightening sheet metal or metalware, esp. brass, by dipping it in acids, etc.

5. The practice of taking snuff by rubbing the teeth or gums with a stick or brush dipped in snuff. [ U.S.]

Dipping needle , a magnetic needle suspended at its center of gravity, and moving freely in a vertical plane, so as to indicate on a graduated circle the magnetic dip or inclination.

Diprismatic adjective [ Prefix di- + prismatic .] Doubly prismatic.

Dipropargyl noun [ Prefix di- + propargyl .] (Chemistry) A pungent, mobile, volatile liquid, C 6 H 6 , produced artificially from certain allyl derivatives. Though isomeric with benzine, it is very different in its chemical relations. Called also dipropinyl .

Dipropyl noun [ Prefix di- + propyl .] (Chemistry) One of the hexane paraffins, found in petroleum, consisting of two propyl radicals. See Hexane .

Diprotodon noun [ Greek di- = di`s- twice + ... first + 'odoy`s , 'odo`ntos , tooth.] (Paleon.) An extinct Quaternary marsupial from Australia, about as large as the hippopotamus; -- so named because of its two large front teeth. See Illustration in Appendix.

Dipsas noun [ Latin , from Greek ..., from ... thirst.]
1. A serpent whose bite was fabled to produce intense thirst. Milton.

2. (Zoology) A genus of harmless colubrine snakes.

Dipsetic adjective [ Greek ....] Tending to produce thirst. Wright.

Dipsey, Dipsie Dip"sy adjective Deep-sea; as, a dipsey line; a dipsy lead. [ Sailor's Cant]

Dipsey, Dipsie Dip"sy noun
1. A sinker attached to a fishing line; also, a line having several branches, each with such a sinker, used in deep-sea fishing. [ Local, U. S.]

2. (Nautical) A deep-sea lead. [ Rare]

Dipsomania noun [ New Latin , from Greek ... thirst + ... mania.] (Medicine) A morbid an uncontrollable craving (often periodic) for drink, esp. for alcoholic liquors; also improperly used to denote acute and chronic alcoholism.

Dipsomaniac noun One who has an irrepressible desire for alcoholic drinks.

Dipsomaniacal adjective Of or pertaining to dipsomania.

Dipsosis noun [ New Latin , from Greek ... thirst.] (Medicine) Excessive thirst produced by disease.

Diptera noun plural [ New Latin , from Greek ... with two wings, di- = di`s- twice + ... feather, wing: confer French diptère .] (Zoology) An extensive order of insects having only two functional wings and two balancers, as the house fly, mosquito, etc. They have a suctorial proboscis, often including two pairs of sharp organs (mandibles and maxillæ) with which they pierce the skin of animals. They undergo a complete metamorphosis, their larvæ (called maggots) being usually without feet.

Dipteral adjective
1. (Zoology) Having two wings only; belonging to the order Diptera.

2. (Anc. Arch.) Having a double row of columns on each on the flanks, as well as in front and rear; -- said of a temple.

Dipteran noun (Zoology) An insect of the order Diptera.

Dipterocarpus noun [ New Latin , from Greek ... with two wings + ... fruit.] (Botany) A genus of trees found in the East Indies, some species of which produce a fragrant resin, other species wood oil. The fruit has two long wings.

Dipterous adjective
1. (Zoology) Having two wings, as certain insects; belonging to the order Diptera.

2. (Botany) Having two wings; two- winged.

Dipterygian adjective [ Greek di- = di`s- twice + ... a fin, dim. of ... wing.] (Zoology) Having two dorsal fins; -- said of certain fishes.

Diptote noun [ Greek ...; di- = di`s- twice + ... falling, from ... to fall: confer French diptote .] (Gram.) A noun which has only two cases. Andrews.

Diptych noun [ Latin diptycha , plural, from Greek ... folded, doubled; di- = di`s- twice + ... to fold, double up.]
1. Anything consisting of two leaves. Especially: (a) (Roman Antiq.) A writing tablet consisting of two leaves of rigid material connected by hinges and shutting together so as to protect the writing within. (b) A picture or series of pictures painted on two tablets connected by hinges. See Triptych .

2. A double catalogue, containing in one part the names of living, and in the other of deceased, ecclesiastics and benefactors of the church; a catalogue of saints.

Dipyre noun [ Greek di- = di`s- twice fire.] (Min.) A mineral of the scapolite group; -- so called from the double effect of fire upon it, in fusing it, and rendering it phosphorescent.

Dipyrenous adjective [ Prefix di- + pyrene .] (Botany) Containing two stones or nutlets.

Dipyridine noun [ Prefix di- + pyridine .] (Geom.) A polymeric form of pyridine, C 10 H 10 N 2 , obtained as a colorless oil by the action of sodium on pyridine.

Dipyridyl noun [ Prefix di- + pyrid ine + -yl .] (Chemistry) A crystalline nitrogenous base, C 10 H 8 N 2 , obtained by the reduction of pyridine.

Diradiation noun [ Prefix di- + radiation .] The emission and diffusion of rays of light.