Diametrically Di·am"e·tric·al·ly adverb In a diametrical manner; directly; as, diametrically opposite.

Whose principles were diametrically opposed to his.

Macaulay.

Diamide Di·am"ide noun [ Prefix di- + amide .] (Chemistry) Any compound containing two amido groups united with one or more acid or negative radicals, -- as distinguished from a diamine. Confer Amido acid , under Amido , and Acid amide , under Amide .

Diamido- Di·am"i·do- adjective (Chemistry) A prefix or combining form of Diamine . [ Also used adjectively.]

Diamine Di·am"ine noun [ Prefix di- + amine .] (Chemistry) A compound containing two amido groups united with one or more basic or positive radicals, -- as contrasted with a diamide .

» In chemical nomenclature, if any amine or diamine is named by prefixing the nitrogen group, the name of the latter takes the form of amido , diamido , etc., thus ethylene diamine , C ₂ H ₄ .(NH ₂ ) ₂ , is also called diamido-ethylene .

Diamond Di"a·mond noun [ Middle English diamaund , diamaunt , French diamant , corrupted, from Latin adamas , the hardest iron, steel, diamond, Greek .... Perh. the corruption is due to the influence of Greek ... transparent. See Adamant , Tame .] 1. A precious stone or gem excelling in brilliancy and beautiful play of prismatic colors, and remarkable for extreme hardness.

» The diamond is native carbon in isometric crystals, often octahedrons with rounded edges. It is usually colorless, but some are yellow, green, blue, and even black. It is the hardest substance known. The diamond as found in nature (called a rough diamond ) is cut, for use in jewelry, into various forms with many reflecting faces, or facets, by which its brilliancy is much increased. See Brilliant , Rose . Diamonds are said to be of the first water when very transparent, and of the second or third water as the transparency decreases.

2. A geometrical figure, consisting of four equal straight lines, and having two of the interior angles acute and two obtuse; a rhombus; a lozenge.

3. One of a suit of playing cards, stamped with the figure of a diamond.

4. (Architecture) A pointed projection, like a four-sided pyramid, used for ornament in lines or groups.

5. (Baseball) The infield; the square space, 90 feet on a side, having the bases at its angles.

6. (Print.) The smallest kind of type in English printing, except that called brilliant , which is seldom seen.

» This line is printed in the type called Diamond .

Black diamond , coal; (Min.) See Carbonado . -- Bristol diamond . See Bristol stone , under Bristol . -- Diamond beetle (Zoology) , a large South American weevil ( Entimus imperialis ), remarkable for its splendid luster and colors, due to minute brilliant scales. -- Diamond bird (Zoology) , a small Australian bird ( Pardalotus punctatus , family Ampelidæ .). It is black, with white spots. -- Diamond drill (Engineering) , a rod or tube the end of which is set with black diamonds; -- used for perforating hard substances, esp. for boring in rock. -- Diamond finch (Zoology) , a small Australian sparrow, often kept in a cage. Its sides are black, with conspicuous white spots, and the rump is bright carmine. -- Diamond groove (Iron Working) , a groove of V-section in a roll. -- Diamond mortar (Chemistry) , a small steel mortar used for pulverizing hard substances. - - Diamond-point tool , a cutting tool whose point is diamond-shaped. -- Diamond snake (Zoology) , a harmless snake of Australia ( Morelia spilotes ); the carpet snake. -- Glazier's diamond , a small diamond set in a glazier's tool, for cutting glass.

Diamond Di"a·mond adjective Resembling a diamond; made of, or abounding in, diamonds; as, a diamond chain; a diamond field.

Diamond anniversary, jubilee Diamond anniversary, jubilee etc. One celebrated upon the completion of sixty, or, according to some, seventy-five, years from the beginning of the thing commemorated.

Diamond State Diamond State Delaware; -- a nickname alluding to its small size.

Diamond-back Di"a·mond-back` noun (Zoology) The salt-marsh terrapin of the Atlantic coast ( Malacoclemmys palustris ).

Diamond-shaped Di"a·mond-shaped` adjective Shaped like a diamond or rhombus.

Diamonded Di"a·mond·ed adjective 1. Having figures like a diamond or lozenge.

2. Adorned with diamonds; diamondized. Emerson.

Diamondize Di"a·mond·ize transitive verb To set with diamonds; to adorn; to enrich. [ R.]

Diamondizing of your subject.

B. Jonson.

Diamylene Di·am"y·lene noun [ Prefix di- + amylene .] (Chemistry) A liquid hydrocarbon, C ₁₀ H ₂₀ , of the ethylene series, regarded as a polymeric form of amylene.

Dian Di"an adjective Diana. [ Poetic]

Diana Di·a"na noun [ Latin Diana .] (Myth.) The daughter of Jupiter and Latona; a virgin goddess who presided over hunting, chastity, and marriage; -- identified with the Greek goddess Artemis .

And chaste Diana haunts the forest shade.

Pope.

Diana monkey (Zoology) , a handsome, white-bearded monkey of West Africa ( Cercopithecus Diana ).

Diandria Di·an"dri·a noun plural [ New Latin , from Greek di- = di`s- twice + ..., ..., a man, a male.] (Botany) A Linnæan class of plants having two stamens.

Diandrian Di·an"dri·an adjective Diandrous.

Diandrous Di·an"drous noun [ Confer French diandre .] (Botany) Of or pertaining to the class Diandria; having two stamens.

Dianium Di·a"ni·um noun [ New Latin , from Latin Diana ; either as the name of the Roman goddess, or from its use in Middle English as a name of silver.] (Chemistry) Same as Columbium . [ Obsolete]

Dianoetic Di`a·no·et"ic adjective [ Greek ...; dia` through + ... to revolve in the mind.] (Metaph.) Pertaining to the discursive faculty, its acts or products.

I would employ . . . dianoetic to denote the operation of the discursive, elaborative, or comparative faculty.

Sir W. Hamilton.

Dianoialogy Di`a·noi·al"o·gy noun [ Greek ... thought + -logy .] The science of the dianoetic faculties, and their operations. Sir W. Hamilton.

Dianthus Di·an"thus noun [ New Latin , from Greek ..., gen. ..., Zeus + 'a`nqos flower.] (Botany) A genus of plants containing some of the most popular of cultivated flowers, including the pink, carnation, and Sweet William.

Diapase Di"a·pase noun Same as Diapason . [ Obsolete]

A tuneful diapase of pleasures.

Spenser.

Diapasm Di"a·pasm noun [ Latin diapasma , Greek ..., from ...; dia` through + ... to sprinkle: confer French diapasme .] Powdered aromatic herbs, sometimes made into little balls and strung together. [ Obsolete]

Diapason Di`a·pa"son noun [ Latin , from Greek diapasw^n ( i. e. , "h dia` pasw^n chordw^n symfoni`a the concord of the first and last notes, the octave); dia` through + pasw^n , gen. plural of pa^s all: confer French diapason . Confer 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 Di`a·pe·de"sis noun [ New Latin , from Greek ... a leaping or oozing through, from ... to leap through; dia` through + ... to leap.] (Medicine) 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 Di`a·pen"te noun [ Latin , from Greek ... a fifth; dia` through + ... five: confer French diapente .] 1. (Anc. Mus.) The interval of the fifth.

2. (Medicine) A composition of five ingredients.

Diaper Di"a·per noun [ Old French diaspre , diapre , diaspe , sort of figured cloth, Italian diaspro jasper, diaspo figured cloth, from Latin 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.

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 Di"a·per transitive verb 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 Di"a·per intransitive verb To draw flowers or figures, as upon cloth. "If you diaper on folds." Peacham.

Diapering Di"a·per·ing noun Same as Diaper , noun , 2.

Diaphane Di"a·phane noun [ Confer French diaphane diaphanous. See Diaphanous .] A woven silk stuff with transparent and colored figures; diaper work.

Diaphaned Di"a·phaned adjective [ Confer Old French diaphaner to make transparent. See Diaphanous .] Transparent or translucent. [ R.]

Diaphaneity Di`a·pha·ne"i·ty noun [ Confer French diaphanéité . See Diaphanous .] The quality of being diaphanous; transparency; pellucidness.

Diaphanic Di`a·phan"ic adjective [ See Diaphanous .] Having power to transmit light; transparent; diaphanous.

Diaphanie Di·aph"a·nie noun The art of imitating stained glass with translucent paper.

Diaphanometer Di`a·pha·nom"e·ter noun [ Greek ... transparent + -meter .] An instrument for measuring the transparency of the air.

Diaphanoscope Di`a·phan"o·scope noun [ Greek ... transparent + -scope .] (Photog.) A dark box constructed for viewing transparent pictures, with or without a lens.

Diaphanotype Di`a·phan"o·type noun [ Greek ... transparent + -type .] (Photog.) A colored photograph produced by superimposing a translucent colored positive over a strong uncolored one.

Diaphanous Di·aph"a·nous adjective [ Greek ..., from ... to show or shine through; dia` through + ... to show, and in the passive, to shine: confer French diaphane . See Phantom , and confer 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 Di·aph"a·nous·ly adverb Translucently.

Diaphemetric Di·aph`e·met"ric adjective [ Greek dia` through + ... touch + ... measure.] (Physiol.) Relating to the measurement of the tactile sensibility of parts; as, diaphemetric compasses. Dunglison.

Diaphonic, Diaphonical Di`a·phon"ic, Di`a·phon"ic·al adjective [ Greek dia` through + ... sound, tone.] Diacoustic.

Diaphonics Di`a·phon"ics noun The doctrine of refracted sound; diacoustics.

Diaphoresis Di`a·pho·re"sis noun [ Latin , from Greek ..., from ... to carry through, to throw off by perspiration; dia` through + ... to carry.] (Medicine) Perspiration, or an increase of perspiration.

Diaphoretic Di`a·pho·ret"ic noun (Medicine) A medicine or agent which promotes perspiration.

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

Diaphoretic, Diaphoretical Di`a·pho·ret"ic, Di`a·pho·ret"ic·al adjective [ Latin diaphoreticus , Greek ...: confer French diaphorétique . See Diaphoresis .] Having the power to increase perspiration.

Diaphote Di"a·phote noun [ Prefix dia- + Greek ..., light.] (Electricity) An instrument designed for transmitting pictures by telegraph. Fallows.

Diaphragm Di"a·phragm noun [ Latin diaphragma , Greek ..., from ... to fence by a partition wall; dia` through + ..., ..., to fence, inclose; probably akin to Latin fareire to stuff: confer French 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. (Zoology) 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. (Machinery) A partition in any compartment, for various purposes.

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

Diaphragmatic Di`a·phrag·mat"ic adjective [ Confer French diaphragmatique .] Pertaining to a diaphragm; as, diaphragmatic respiration; the diaphragmatic arteries and nerves.

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