Webster's Unabridged Dictionary - Letter D - Page 45
Diagnostic (n.) 特徵的診斷，病的徵候，診斷法 The mark or symptom by which one disease is known or distinguished from others.
Diagnostic (a.) Concerned with diagnosis; used for furthering diagnosis; "a diagnostic reading test."
Diagnostic (a.) Characteristic or indicative of a disease; "a diagnostic sign of yellow fever"; "a rash symptomatic of scarlet fever"; "symptomatic of insanity"; "a rise in crime symptomatic of social breakdown" [syn: diagnostic, symptomatic].
Compare: Symptomatic
Symptomatic, Symptomatical (a.) 症狀的；作為徵兆的 Of or pertaining to symptoms; happening in concurrence with something; being a symptom; indicating the existence of something else.
Symptomatic of a shallow understanding and an unamiable temper. -- Macaulay.
Symptomatic, Symptomatical (a.) According to symptoms; as, a symptomatical classification of diseases. -- Symp`tom*at"ic*al*ly, adv.
Symptomatic (a.) Characteristic or indicative of a disease; "a diagnostic sign of yellow fever"; "a rash symptomatic of scarlet fever"; "symptomatic of insanity"; "a rise in crime symptomatic of social breakdown" [syn: diagnostic, symptomatic].
Symptomatic (a.) Relating to or according to or affecting a symptom or symptoms; "symptomatic relief"; "symptomatic treatment"; "a symptomatic classification of diseases."
Compare: Insanity
Insanity (n.) 精神失常；極端愚蠢 The state of being insane; unsoundness or derangement of mind; madness; lunacy.
All power of fancy over reason is a degree of insanity. -- Johnson.
Without grace The heart's insanity admits no cure. -- Cowper.
Insanity (n.) (Law) Such a mental condition, as, either from the existence of delusions, or from incapacity to distinguish between right and wrong, with regard to any matter under action, does away with individual responsibility.
Syn: Insanity, Lunacy, Madness, Derangement, Alienation, Aberration, Mania, Delirium, Frenzy, Monomania, Dementia.
Usage: Insanity is the generic term for all such diseases; lunacy has now an equal extent of meaning, though once used to denote periodical insanity; madness has the same extent, though originally referring to the rage created by the disease; derangement, alienation, are popular terms for insanity; delirium, mania, and frenzy denote excited states of the disease; dementia denotes the loss of mental power by this means; monomania is insanity upon a single subject.
Insanity (n.) Relatively permanent disorder of the mind [ant: saneness, sanity].
Insanity, () med. jur. A continued impetuosity of thought, which, for the time being, totally unfits a man for judging and acting in relation to the matter in question, with the composure requisite for the maintenance of the social relations of life. Various other definitions of this state have been given, but perhaps the subject is not susceptible of any satisfactory definition, which shall, with, precision, include all cases of insanity, and exclude all others. Ray, Med. Jur. Sec. 24, p. 50.
Insanity, () It may be considered in a threefold point of view: 1. A chronic disease, manifested by deviations from the healthy and natural state of the mind, such deviations consisting in a morbid perversion of the feelings, affections and habits. 2. Disturbances of the intellectual faculties, under the influence of which the understanding becomes susceptible of hallucinations or erroneous. impressions of a particular kind. 3. A state of mental incoherence or constant hurry and confusion of thought. Cyclo. Practical Medicine, h. t.; Brewster's Encyclopaedia, h. t.; Observations on the Deranged Manifestations of the Mind, or Insanity, 71, 72; Merl. R,pert. mots Demenoe, Folie, Imbecilite; 6 Watts & Serg. 451.
Insanity (n.) The diseases included under the name of insanity have been arranged under two divisions, founded on two very different conditions of the brain. Ray, Med. Jur. ch. 1, Sec. 33.
Insanity (n.) The want of, or a defective development of the faculties. 1st. Idiocy, resulting from, 1. Congenital defect. 2. An obstacle to the development of the faculties, supervening in infancy. 2d. Imbecility, resulting from, 1. Congenital defects. 2. An obstacle to the development of the faculties, supervening in infancy.
Insanity (n.) The lesion of the faculties subsequent to their development. In this division may be classed, 1st. Mania, which is, 1. Intellectual, and is general or partial. 2. Affective and is general or, partial. 2d. Dementia, which is, 1. Consecutive to mania, or injuries of the brain. 2. Senile, or peculiar to old age.
Insanity (n.) There is also a disease which has acquired the name of Moral insanity. (q. v.)
Insanity (n.) Insanity is an excuse for the commission of acts which in others would be crimes, because the insane man has no intention; it deprives a man also from entering into any valid contract. Vide Lunacy; Non compos mentis, and Stock on the Law of Non Compotes Mentis; 1 Hagg. Cons. R. 417; 3 Addams, R. 90, 91, 180, 181; 3 Hagg. Eccl. R. 545, 598, 600; 2 Greenl. Ev. Sec. 369, 374; Bouv. Inst. Index, h. t.
Diagnosticate (v. t. & i.) 診斷，判斷 To make a diagnosis of; to recognize by its symptoms, as a disease.
Diagnostics (n.) 診斷 That part of medicine which has to do with ascertaining the nature of diseases by means of their symptoms or signs.
His rare skill in diagnostics. -- Macaulay.
Diagnostics (n.) The branch of medical science dealing with the classification of disease [syn: nosology, diagnostics].
Compare: Nosology
Nosology (n.) 疾病分類學 A systematic arrangement, or classification, of diseases.
Nosology (n.) That branch of medical science which treats of diseases, or of the classification of diseases.
Compare: Pathology
Pathology (n.; pl. Pathologies) (Med.) 病理學；病理 The science which treats of diseases, their nature, causes, progress, symptoms, etc.
Note: Pathology is general or special, according as it treats of disease or morbid processes in general, or of particular diseases; it is also subdivided into internal and external, or medical and surgical pathology. Its departments are nosology, [ae]tiology, morbid anatomy, symptomatology, and therapeutics, which treat respectively of the classification, causation, organic changes, symptoms, and cure of diseases.
Pathology (n.; pl. Pathologies) (Med.) The condition of an organ, tissue, or fluid produced by disease.
Celluar pathology, A theory that gives prominence to the vital action of cells in the healthy and diseased functions of the body. -- Virchow.
Nosology (n.) The branch of medical science dealing with the classification of disease [syn: nosology, diagnostics].
Diagometer (n.) 電導計 A sort of electroscope, invented by Rousseau, in which the dry pile is employed to measure the amount of electricity transmitted by different bodies, or to determine their conducting power. -- Nichol.
Nonparallel (a.) Not parallel; -- of lines or linear objects. Opposite of parallel. [Narrower terms: bias, catacorner, cata-cornered, catercorner, cater-cornered, catty-corner, catty-cornered, diagonal, kitty-corner, kitty-cornered, oblique, skew, skewed, slanted ; crossed, decussate, intersectant, intersecting; cross-grained ; diagonal; orthogonal, orthographic, rectangular, right-angled ; right, perpendicular; angled ; convergent] Also See: convergent, divergent, diverging.
Nonparallel (a.) (Computers) Not using parallel processing; -- of computers. [Narrower terms: serial]
Diagonal (a.) (Geom.) 對角線的，斜的，斜紋的 Joining two not adjacent angles of a quadrilateral or multilateral figure; running across from corner to corner; crossing at an angle with one of the sides.
Diagonal bond (Masonry), herringbone work. See Herringbone, a.
Diagonal built (Shipbuilding), Built by forming the outer skin of two layers of planking, making angles of about 45[deg] with the keel, in opposite directions.
Diagonal cleavage. See under Cleavage.
Diagonal molding (Arch.), A chevron or zigzag molding.
Diagonal rib. (Arch.) See Cross-springer.
Diagonal scale, A scale which consists of a set of parallel lines, with other lines crossing them obliquely, so that their intersections furnish smaller subdivisions of the unit of measure than could be conveniently marked on a plain scale.
Diagonal stratification. (Geol.) Same as Cross bedding, under Cross, a.
Diagonal (n.) 對角線，斜線，斜列 A right line drawn from one angle to another not adjacent, of a figure of four or more sides, and dividing it into two parts.
Diagonal (n.) (Engin.) A member, in a framed structure, running obliquely across a panel.
Diagonal (n.) A diagonal cloth; a kind of cloth having diagonal stripes, ridges, or welts made in the weaving.
Diagonal (a.) Connecting two nonadjacent corners of a plane figure or any two corners of a solid that are not in the same face; "a diagonal line across the page."
Diagonal (a.) Having an oblique or slanted direction [syn: aslant, aslope, diagonal, slanted, slanting, sloped, sloping].
Diagonal (n.) (Geometry) A straight line connecting any two vertices of a polygon that are not adjacent.
Diagonal (n.) A line or cut across a fabric that is not at right angles to a side of the fabric [syn: diagonal, bias].
Diagonal (n.) An oblique line of squares of the same color on a checkerboard; "the bishop moves on the diagonals."
Diagonal (n.) (Mathematics) A set of entries in a square matrix running diagonally either from the upper left to lower right entry or running from the upper right to lower left entry.
Diagonal (n.) A punctuation mark (/) used to separate related items of information [syn: solidus, slash, virgule, diagonal, stroke, separatrix].
Diagonally (adv.) 斜向地；沿對角線地 In a diagonal direction.
Diagonial (a.) Diagonal; diametrical; hence; diametrically opposed.
Diagram (n.) 圖表；圖解；（曲）線圖；示圖 [C] A figure or drawing made to illustrate a statement, or facilitate a demonstration; a plan.
Diagram (n.) Any simple drawing made for mathematical or scientific purposes, or to assist a verbal explanation which refers to it; a mechanical drawing, as distinguished from an artistical one.
Diagram (v. t.) 用圖解法表示，圖示 To put into the form of a diagram.
Diagrammatic (a.) 圖表[式] 的 Pertaining to, or of the nature of, a diagram; showing by diagram.
Diagraph (n.) 分度尺，作圖器，原圖放大圖器 A drawing instrument, combining a protractor and scale.
Diagraphic (a.) Alt. of Diagraphical.
Diagraphical (a.) Descriptive.
Diagraphics (n.) The art or science of descriptive drawing; especially, the art or science of drawing by mechanical appliances and mathematical rule.
Diaheliotropic (a.) (Bot.) Relating or, or manifesting, diaheliotropism.
Diaheliotropism (n.) (Bot.) 光線較弱的時候，調整葉片與陽光照射的方向成垂直 A tendency of leaves or other organs of plants to have their dorsal surface faced towards the rays of light.
Dial (n.) 撥號盤；刻度盤；調節器；控制器；表盤；鐘盤；臉 An instrument, formerly much used for showing the time of day from the shadow of a style or gnomon on a graduated arc or surface; esp., a sundial; but there are lunar and astral dials. The style or gnomon is usually parallel to the earth's axis, but the dial plate may be either horizontal or vertical.
Dial (n.) The graduated face of a timepiece, on which the time of day is shown by pointers or hands.
Dial (n.) A miner's compass.
Dial bird (Zool.), An Indian bird ({Copsychus saularius"> Dial bird (Zool.), an Indian bird ({Copsychus saularius), allied to the European robin. The name is also given to other related species.
Dial lock, A lock provided with one or more plates having numbers or letters upon them. These plates must be adjusted in a certain determined way before the lock can be operated.
Dial plate, The plane or disk of a dial or timepiece on which lines and figures for indicating the time are placed.
Dialed (imp. & p. p.) of Dial.
Dialled () of Dial.
Dialing (p. pr. & vb. n.) of Dial.
Dialling () of Dial.
Dial (v. t.) 撥電話給；撥 To measure with a dial.
Hours of that true time which is dialed in heaven. -- Talfourd.
Dial (v. t.) (Mining) To survey with a dial. -- Raymond.
Dial (n.) The face of a timepiece; graduated to show the hours.
Dial (n.) The control on a radio or television set that is used for tuning.
Dial (n.) The circular graduated indicator on various measuring instruments.
Dial (n.) A disc on a telephone that is rotated a fixed distance for each number called [syn: dial, telephone dial].
Dial (v. i.) 撥號 Operate a dial to select a telephone number; "You must take the receiver off the hook before you dial."
Dial (v.) Choose by means of a dial; "dial a telephone number."
Dial, () For the measurement of time, only once mentioned in the Bible, erected by Ahaz (2 Kings 20:11; Isa. 38:8). The Hebrew word (ma'aloth) is rendered "steps" in Ex. 20:26, 1 Kings 10:19, and "degrees" in 2 Kings 20:9, 10, 11. The _ma'aloth_ was probably stairs on which the shadow of a column or obelisk placed on the top fell. The shadow would cover a greater or smaller number of steps, according as the sun was low or high.
Probably the sun-dial was a Babylonian invention. Daniel at Babylon (Dan. 3:6) is the first to make mention of the "hour."
Dialect (n.) (pl. -s) 方言 Means or mode of expressing thoughts; language; tongue; form of speech.
This book is writ in such a dialect As may the minds of listless men affect. Bunyan.
The universal dialect of the world. -- South.
Dialect (n.) The form of speech of a limited region or people, as distinguished from ether forms nearly related to it; a variety or subdivision of a language; speech characterized by local peculiarities or specific circumstances; as, the Ionic and Attic were dialects of Greece; the Yorkshire dialect; the dialect of the learned.
In the midst of this Babel of dialects there suddenly appeared a standard English language. -- Earle.
[Charles V.] could address his subjects from every quarter in their native dialect. -- Prescott.
Syn: Language; idiom; tongue; speech; phraseology. See Language, and Idiom.
Dialect (n.) The usage or vocabulary that is characteristic of a specific group of people; "the immigrants spoke an odd dialect of English"; "he has a strong German accent"; "it has been said that a language is a dialect with an army and navy" [syn: dialect, idiom, accent].
Dial, () For the measurement of time, only once mentioned in the Bible, erected by Ahaz (2 Kings 20:11; Isa. 38:8). The Hebrew word (ma'aloth) is rendered "steps" in Ex. 20:26, 1 Kings 10:19, and "degrees" in 2 Kings 20:9, 10, 11. The _ma'aloth_ was probably stairs on which the shadow of a column or obelisk placed on the top fell. The shadow would cover a greater or smaller number of steps, according as the sun was low or high.
Probably the sun-dial was a Babylonian invention. Daniel at Babylon (Dan. 3:6) is the first to make mention of the "hour."
Dialectal (a.) Relating to a dialect; dialectical; as, a dialectical variant.
Dialectal (a.) Belonging to or characteristic of a dialect; "dialectal variation."
Dialectic (n.) Same as Dialectics.
Plato placed his dialectic above all sciences. -- Liddell & Scott. Dialectic
Dialectic (a.) Alt. of Dialectical.
Dialectical (a.) 辯證的 Pertaining to dialectics; logical; argumental.
Dialectical (a.) Pertaining to a dialect or to dialects. --Earle.
Dialectic (a.) Of or relating to or employing dialectic; "the dialectical method" [syn: dialectic, dialectical].
Dialectic (n.) Any formal system of reasoning that arrives at the truth by the exchange of logical arguments.
Dialectic (n.) A contradiction of ideas that serves as the determining factor in their interaction; "this situation created the inner dialectic of American history."
Dialectically (adv.) In a dialectical manner.
Dialectically (adv.) In a dialectic manner; "his religiousness is dialectically related to his sinfulness."
Dialectician (n.) One versed in dialectics; a logician; a reasoner.
Dialectician (n.) A logician skilled in dialectic.
Dialectics (n.) That branch of logic which teaches the rules and modes of reasoning; the application of logical principles to discursive reasoning; the science or art of discriminating truth from error; logical discussion.
Note: Dialectics was defined by Aristotle to be the method of arguing with probability on any given problem, and of defending a tenet without inconsistency. By Plato, it was used in the following senses:
1. Discussion by dialogue as a method of scientific investigation.
2. The method of investigating the truth by analysis.
3. The science of ideas or of the nature and laws of being -- higher metaphysics. By Kant, it was employed to signify the logic of appearances or illusions, whether these arise from accident or error, or from those necessary limitations which, according to this philosopher, originate in the constitution of the human intellect.
Dialectics (n.) A rationale for dialectical materialism based on change through the conflict of opposing forces.
Dialectic (n.) [ U ] (Also Dialectics) (Specialized) 辯證法 A way of discovering what is true by considering opposite theories.
Dialectology (n.) That branch of philology which is devoted to the consideration of dialects. -- Beck.
Dialectology (n.) The branch of philology that is devoted to the study of dialects.
Dialector (n.) One skilled in dialectics.
Dialing (n.) The art of constructing dials; the science which treats of measuring time by dials. [Written also dialling.]
Dialing (n.) A method of surveying, especially in mines, in which the bearings of the courses, or the angles which they make with each other, are determined by means of the circumferentor.
Dialist (n.) A maker of dials; one skilled in dialing.
Diallage (n.) (Rhet.) A figure by which arguments are placed in various points of view, and then turned to one point. -- Smart.
Diallage (n.) (Min.) A dark green or bronze-colored laminated variety of pyroxene, common in certain igneous rocks.
Diallel (a.) Meeting and intersecting, as lines; not parallel; -- opposed to parallel. [Obs.] -- Ash.
Diallyl (n.) (Chem.) A volatile, pungent, liquid hydrocarbon, C6H10, consisting of two allyl radicals, and belonging to the acetylene series.
Dialogical (a.) Relating to a dialogue; dialogistical.
Dialogically (adv.) In the manner or nature of a dialogue. -- Goldsmith.
Dialogism (n.) An imaginary speech or discussion between two or more; dialogue. -- Fulke.
Dialogist (n.) A speaker in a dialogue.
Dialogist (n.) A writer of dialogues. -- P. Skelton. Dialogistic
Dialogistic (a.) Alt. of Dialogistical.
Dialogistical (a.) Pertaining to a dialogue; having the form or nature of a dialogue. -- Di*al`o*gis"tic*al*ly, adv.
Compare: Rhodochrosite
Rhodochrosite (n.) (Min.) Manganese carbonate, a rose-red mineral sometimes occuring crystallized, but generally massive with rhombohedral cleavage like calcite; -- called also dialogite.
Dialogite (n.) (Min.) Native carbonate of manganese; rhodochrosite.
Dialogize (v. t.) To discourse in dialogue.
Dialogue (n.) A conversation between two or more persons; particularly, a formal conservation in theatrical performances or in scholastic exercises.
Dialogue (n.) A written composition in which two or more persons are represented as conversing or reasoning on some topic; as, the Dialogues of Plato.
Dialogue (v. i.) To take part in a dialogue; to dialogize.
Dialogue (v. t.) To express as in dialogue.
Dialypetalous (a.) Having separate petals; polypetalous.
Dialyses (n. pl. ) of Dialysis.
Dialysis (n.) Diaeresis. See Diaeresis, 1.
Dialysis (n.) Same as Asyndeton.
Dialysis (n.) Debility.
Dialysis (n.) A solution of continuity; division; separation of parts.
Dialysis (n.) The separation of different substances in solution, as crystalloids and colloids, by means of their unequal diffusion, especially through natural or artificial membranes.
Dialytic (a.) Having the quality of unloosing or separating.
Dialyzate (n.) The material subjected to dialysis.
Dialyzation (n.) The act or process of dialysis.
Dialyzed (imp. & p. p.) of Dialyze.
Dialyzing (p. pr. & vb. n.) of Dialyze.
Dialyze (v. t.) To separate, prepare, or obtain, by dialysis or osmose; to pass through an animal membrane; to subject to dialysis.
Dialyzed (a.) Prepared by diffusion through an animal membrane; as, dialyzed iron.
Dialyzer (n.) The instrument or medium used to effect chemical dialysis.
Diamagnet (n.) A body having diamagnetic polarity.
Diamagnetic (a.) 反磁性的 Pertaining to, or exhibiting the phenomena of, diamagnetism; taking, or being of a nature to take, a position at right angles to the lines of magnetic force. See Paramagnetic.
Diamagnetic (n.) 反磁性體 Any substance, as bismuth, glass, phosphorous, etc., which in a field of magnetic force is differently affected from the ordinary magnetic bodies, as iron; that is, which tends to take a position at right angles to the lines of magnetic force, and is repelled by either pole of the magnet.
Diamagnetic (n.) Relating to or exhibiting diamagnetism; slightly repelled by a magnet.
Diamagnetically (adv.) In the manner of, or according to, diamagnetism.
Diamagnetism (n.) 反磁性，逆磁性，反磁性學 The science which treats of diamagnetic phenomena, and of the properties of diamagnetic bodies.
Diamagnetism (n.) That form or condition of magnetic action which characterizes diamagnetics.
Diamagnetism (n.) The magnetic action which characterizes diamagnetic substances, the magnetic moments of which tend to oppose an externally applied magnetic field. Contrasted with {paramagnetism} and {ferromagnetism}.
Diamagnetism (n.) phenomenon exhibited by materials like copper or bismuth that become magnetized in a magnetic field with a polarity opposite to the magnetic force; unlike iron they are slightly repelled by a magnet.
Diamantiferous (a.) Yielding diamonds.
Diamantine (a.) Adamantine.
Diameter (n.) (Geom.) [C] 直徑；倍（透鏡等的放大單位） Any right line passing through the center of a figure or body, as a circle, conic section, sphere, cube, etc., and terminated by the opposite boundaries; a straight line which bisects a system of parallel chords drawn in a curve.
Diameter (n.) A diametral plane.
Diameter (n.) The length of a straight line through the center of an object from side to side; width; thickness; as, the diameter of a tree or rock.
Note: In an elongated object the diameter is usually taken at right angles to the longer axis.
Diameter (n.) (Arch.) The distance through the lower part of the shaft of a column, used as a standard measure for all parts of the order. See Module.
Conjugate diameters. See under Conjugate.
Diameter (n.) The length of a straight line passing through the center of a circle and connecting two points on the circumference [syn: diameter, diam].
Diameter (n.) A straight line connecting the center of a circle with two points on its perimeter (or the center of a sphere with two points on its surface).
Diameter () The diameter of a graph is the maximum value of the minimum distance between any two nodes.
Diametral (a.) 直徑的 Pertaining to a diameter; diametrical.
Diametral curve, Diametral surface (Geom.), Any line or surface which bisects a system of parallel chords drawn in a curve or surface.
Diametral planes (Crystal.), Planes in which two of the axes lie.
Diametral (n.) A diameter. [Obs.] -- Sir T. Browne.
Diametral (a.) Related to or along a diameter; "the diametral plane" [syn: diametral, diametric, diametrical].
Diametrally (adv.) Diametrically. Diametric
Diametric (a.) Alt. of Diametrical.
Diametrical (a.) 直徑的；正好相反的 Of or pertaining to a diameter.
Diametrical (a.) As remote as possible, as if at the opposite end of a diameter; directly adverse.
Diametric (a.) Related to or along a diameter; "the diametral plane" [syn: diametral, diametric, diametrical].
Diametric (a.) Characterized by opposite extremes; completely opposed; "in diametric contradiction to his claims"; "diametrical (or opposite) points of view"; "opposite meanings"; "extreme and indefensible polar positions" [syn: diametric, diametrical, opposite, polar].
Diametrically (adv.) 完全地; 截然；在直徑上 In a diametrical manner; directly; as, diametrically opposite.
Whose principles were diametrically opposed to his. -- Macaulay.
Diametrically (adv.) As from opposite ends of a diameter; "when two honest witnesses give accounts of the same event that differ diametrically, how can anyone prove that the evidence you gave was deliberately false?"; "three of these brushes were approximately 120 feet apart and the fourth diametrically opposite to one of the three."
Diametrically (adv.) 完全地，完整地 Completely.
// The two politicians have diametrically opposite points of view/ are diametrically opposed.
Compare: Hydrazine
Hydrazine (n.) (Chem.) 聯胺（Hydrazine，化學式為N2H4） 是一種無色、具有刺激性氨味的油狀液體，具有高反應性、強還原性及高毒性。
核心特性與用途
物理性質：常態下為無色透明液體，沸點約 113.5°C，易溶於水及醇類。
火箭燃料：因燃燒熱值高且反應劇烈，常作為人造衛星、火箭及太空探測器（如好奇號、朱諾號）的推進劑。Any one of a series of nitrogenous bases, resembling the amines and produced by the reduction of certain nitroso and diazo compounds; as, methyl hydrazine, phenyl hydrazine, etc. They are derivatives of hydrazine proper, H2N.NH2, which is a doubled amido group, recently (1887) isolated as a stable, colorless gas, with a peculiar, irritating odor. As a base it forms distinct salts. Called also diamide, amidogen, (or more properly diamidogen), etc.
Hydrazine (n.) A colorless fuming corrosive liquid; a powerful reducing agent; used chiefly in rocket fuels.
Diamide (n.) (Chem.) Any compound containing two amido groups united with one or more acid or negative radicals, -- as distinguished from a diamine. Cf. Amido acid, under Amido, and Acid amide, under Amide.
Diamido- (a.) (Chem.) A prefix or combining form of Diamine. Note: [Also used adjectively.]
Diamine (n.) (Chem.) A compound containing two amido groups united with one or more basic or positive radicals, -- as contrasted with a diamide.
Note: 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, C2H4.(NH2)2, is also called diamido-ethylene.
Diamine (n.) Any organic compound containing two amino groups.
Diamond (n.) 鑽石，金剛鑽 [C] [U]；菱形 [C] A precious stone or gem excelling in brilliancy and beautiful play of prismatic colors, and remarkable for extreme hardness.
Note: 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.
Diamond (n.) A geometrical figure, consisting of four equal straight lines, and having two of the interior angles acute and two obtuse; a rhombus; a lozenge.