| diabetes | (noun) a polygenic disease characterized by abnormally high glucose levels in the blood; any of several metabolic disorders marked by excessive urination and persistent thirst | - |
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| diabetic | (noun) someone who has diabetes | - |
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| diablotin | (noun) a thin round slice of bread usually served with soup, especially consomme. | - |
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| diabolatry | (noun) the acts or rites of worshiping devils | Synonyms: demonolatry, devil-worship |
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| diabolism | (noun) a belief in and reverence for devils (especially Satan) | Synonyms: demonism, Satanism |
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| diabolist | (noun) an adherent of Satan or Satanism | Synonyms: Satanist |
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| diacetylmorphine | (noun) a narcotic that is considered a hard drug; a highly addictive morphine derivative; intravenous injection provides the fastest and most intense rush | Synonyms: heroin |
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| diachrony | (noun) the study of linguistic change | Synonyms: diachronic linguistics, historical linguistics |
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| diacritic | (noun) a mark added to a letter to indicate a special pronunciation | Synonyms: diacritical mark |
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| diadem | (noun) an ornamental jeweled headdress signifying sovereignty | Synonyms: crown |
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| diaeresis | (noun) a diacritical mark (two dots) placed over a vowel to indicate that it does not form a diphthong with an adjacent vowel | Synonyms: dieresis |
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| diaglyph | (noun) glyptic art consisting of a sunken or depressed engraving or carving on a stone or gem (as opposed to cameo) | Synonyms: intaglio |
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| diagnosing | (noun) identifying the nature or cause of some phenomenon | Synonyms: diagnosis |
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| diagnosis | (noun) identifying the nature or cause of some phenomenon | Synonyms: diagnosing |
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| diagnostician | (noun) a doctor who specializes in medical diagnosis | Synonyms: pathologist |
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| diagnostics | (noun) the branch of medical science dealing with the classification of disease | Synonyms: nosology |
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| diagonal | (noun) a punctuation mark (/) used to separate related items of information | Synonyms: separatrix, slash, solidus, stroke, virgule |
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| (noun) an oblique line of squares of the same color on a checkerboard | - |
| (noun) (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 | - |
| (noun) a line or cut across a fabric that is not at right angles to a side of the fabric | Synonyms: bias |
| (noun) (geometry) a straight line connecting any two vertices of a polygon that are not adjacent | - |
| diagonalisation | (noun) changing a square matrix to diagonal form (with all non-zero elements on the principal diagonal) | Synonyms: diagonalization |
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| diagonalization | (noun) changing a square matrix to diagonal form (with all non-zero elements on the principal diagonal) | Synonyms: diagonalisation |
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| diagram | (noun) a drawing intended to explain how something works; a drawing showing the relation between the parts | - |
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| diagramming | (noun) providing a chart or outline of a system | Synonyms: schematisation, schematization |
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| diakinesis | (noun) the final stage of the prophase of meiosis | - |
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| dial | (noun) the face of a timepiece; graduated to show the hours | - |
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| (noun) a disc on a telephone that is rotated a fixed distance for each number called | Synonyms: telephone dial |
| (noun) the circular graduated indicator on various measuring instruments | - |
| (noun) the control on a radio or television set that is used for tuning | - |
| dialect | (noun) the usage or vocabulary that is characteristic of a specific group of people | Synonyms: accent, idiom |
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| dialectic | (noun) any formal system of reasoning that arrives at the truth by the exchange of logical arguments | - |
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| (noun) a contradiction of ideas that serves as the determining factor in their interaction | - |
| dialectician | (noun) a logician skilled in dialectic | - |
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| dialectics | (noun) a rationale for dialectical materialism based on change through the conflict of opposing forces | - |
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| dialectology | (noun) the branch of philology that is devoted to the study of dialects | - |
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| dialog | (noun) the lines spoken by characters in drama or fiction | Synonyms: dialogue |
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| (noun) a conversation between two persons | Synonyms: dialogue, duologue |
| (noun) a literary composition in the form of a conversation between two people | Synonyms: dialogue |
| dialogism | (noun) the use in a text of different tones or viewpoints, whose interaction or contradiction is important to the text's interpretation. | - |
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| dialogue | (noun) the lines spoken by characters in drama or fiction | Synonyms: dialog |
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| (noun) a conversation between two persons | Synonyms: dialog, duologue |
| (noun) a literary composition in the form of a conversation between two people | Synonyms: dialog |
| (noun) a discussion intended to produce an agreement | Synonyms: negotiation, talks |
| dialysis | (noun) separation of substances in solution by means of their unequal diffusion through semipermeable membranes | - |
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| dialyzer | (noun) a medical instrument for separating substances in solution by unequal diffusion through semipermeable membranes | Synonyms: dialysis machine |
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| diam | (noun) the length of a straight line passing through the center of a circle and connecting two points on the circumference | Synonyms: diameter |
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| diamagnet | (noun) a substance that exhibits diamagnetism | - |
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| diamagnetism | (noun) 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 | - |
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| diamante | (noun) adornment consisting of a small piece of shiny material used to decorate clothing | Synonyms: sequin, spangle |
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| (noun) fabric covered with glittering ornaments such as sequins or rhinestones | - |
| diameter | (noun) the length of a straight line passing through the center of a circle and connecting two points on the circumference | Synonyms: diam |
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| (noun) 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) | - |
| diamine | (noun) any organic compound containing two amino groups | - |
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| diamond | (noun) the area of a baseball field that is enclosed by 3 bases and home plate | Synonyms: baseball diamond, infield |
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| (noun) a playing card in the minor suit that has one or more red rhombuses on it | - |
| (noun) the baseball playing field | Synonyms: ball field, baseball field |
| (noun) a transparent piece of diamond that has been cut and polished and is valued as a precious gem | - |
| (noun) a parallelogram with four equal sides; an oblique-angled equilateral parallelogram | Synonyms: rhomb, rhombus |
| (noun) very hard native crystalline carbon valued as a gem | Synonyms: adamant |
| diamondback | (noun) large deadly rattlesnake with diamond-shaped markings | Synonyms: Crotalus adamanteus, diamondback rattlesnake |
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| diapason | (noun) either of the two main stops on a pipe organ | Synonyms: diapason stop |
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| diapedesis | (noun) passage of blood cells (especially white blood cells) through intact capillary walls and into the surrounding tissue | - |
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| diapensia | (noun) any boreal low-growing evergreen plant of the genus Diapensia | - |
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| diaper | (noun) garment consisting of a folded cloth drawn up between the legs and fastened at the waist; worn by infants to catch excrement | Synonyms: napkin, nappy |
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| (noun) a fabric (usually cotton or linen) with a distinctive woven pattern of small repeated figures | - |
| diaphanoscope | (noun) An instrument for illuminating the interior of a cavity to determine the translucency of its walls. | - |
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| diapheromera | (noun) a variety of stick insect | Synonyms: Diapheromera femorata |
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| diaphone | (noun) a foghorn that makes a signal consisting of two tones | - |
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| diaphoresis | (noun) the process of the sweat glands of the skin secreting a salty fluid | Synonyms: hidrosis, perspiration, sudation, sweating |
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| diaphoretic | (noun) used to produce perspiration | - |
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| diaphragm | (noun) a mechanical device in a camera that controls size of aperture of the lens | Synonyms: stop |
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| (noun) electro-acoustic transducer that vibrates to receive or produce sound waves | - |
| (noun) a contraceptive device consisting of a flexible dome-shaped cup made of rubber or plastic; it is filled with spermicide and fitted over the uterine cervix | Synonyms: contraceptive diaphragm, pessary |
| (noun) (anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration | Synonyms: midriff |
| diaphysis | (noun) the main (mid) section of a long bone | Synonyms: shaft |
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| diapir | (noun) a domed rock formation where a core of rock has moved upward and pierced through the more brittle overlying strata | - |
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| diapsid | (noun) reptile having a pair of openings in the skull behind each eye | Synonyms: diapsid reptile |
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| diarchy | (noun) a form of government having two joint rulers | Synonyms: dyarchy |
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| diarist | (noun) someone who keeps a diary or journal | Synonyms: diary keeper, journalist |
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| diarrhea | (noun) frequent and watery bowel movements; can be a symptom of infection or food poisoning or colitis or a gastrointestinal tumor | Synonyms: diarrhoea, looseness, looseness of the bowels |
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| diarrhoea | (noun) frequent and watery bowel movements; can be a symptom of infection or food poisoning or colitis or a gastrointestinal tumor | Synonyms: diarrhea, looseness, looseness of the bowels |
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| diarthrosis | (noun) a joint so articulated as to move freely | Synonyms: articulatio synovialis, synovial joint |
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| diary | (noun) a personal journal (as a physical object) | - |
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| (noun) a daily written record of (usually personal) experiences and observations | Synonyms: journal |
| diaspora | (noun) the dispersion or spreading of something that was originally localized (as a people or language or culture) | - |
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| (noun) the body of Jews (or Jewish communities) outside Palestine or modern Israel | - |
| diastasis | (noun) separation of an epiphysis from the long bone to which it is normally attached without fracture of the bone | - |
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| diastema | (noun) a gap or vacant space between two teeth | - |
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| diastole | (noun) the widening of the chambers of the heart between two contractions when the chambers fill with blood | - |
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| diastrophism | (noun) the process of deformation that produces continents and ocean basins in the earth's crust | - |
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| diathermy | (noun) a method of physical therapy that involves generating local heat in body tissues by high-frequency electromagnetic currents | - |
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| diathesis | (noun) constitutional predisposition to a particular disease or abnormality | - |
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| diatom | (noun) microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silica | - |
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| diatomite | (noun) a light soil consisting of siliceous diatom remains and often used as a filtering material | Synonyms: diatomaceous earth, kieselguhr |
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| diatribe | (noun) thunderous verbal attack | Synonyms: fulmination |
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| diazepam | (noun) a tranquilizer (trade name Valium) used to relieve anxiety and relax muscles; acts by enhancing the inhibitory actions of the neurotransmitter GABA; can also be used as an anticonvulsant drug in cases of nerve agent poisoning | Synonyms: Valium |
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| diazonium | (noun) the univalent cation R-N:N- (where R is an aromatic hydrocarbon); found in salts that are used in manufacturing azo dyes | - |
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| diazoxide | (noun) vasodilator (trade name Hyperstat) used to treat severe hypertension | Synonyms: Hyperstat |
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| dibber | (noun) a wooden hand tool with a pointed end; used to make holes in the ground for planting seeds or bulbs | Synonyms: dibble |
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| dibble | (noun) a wooden hand tool with a pointed end; used to make holes in the ground for planting seeds or bulbs | Synonyms: dibber |
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| dibbuk | (noun) (Jewish folklore) a demon that enters the body of a living person and controls that body's behavior | Synonyms: dybbuk |
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| dibrach | (noun) a metrical unit with unstressed-unstressed syllables | Synonyms: pyrrhic |
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| dibranch | (noun) cephalopods having two gills | Synonyms: dibranchiate, dibranchiate mollusk |
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| dibranchiate | (noun) cephalopods having two gills | Synonyms: dibranch, dibranchiate mollusk |
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| dibs | (noun) a claim of rights | - |
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| dibucaine | (noun) a local anesthetic that is administered by injection | - |
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| dicamptodon | (noun) salamanders found near cold streams throughout the year | Synonyms: dicamptodontid |
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| dicamptodontid | (noun) salamanders found near cold streams throughout the year | Synonyms: dicamptodon |
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| dice | (noun) a small cube with 1 to 6 spots on the six faces; used in gambling to generate random numbers | Synonyms: die |
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| dicer | (noun) a mechanical device used for dicing food | - |
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| dichloride | (noun) a compound containing two chlorine atoms per molecule | Synonyms: bichloride |
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| dichlorodiphenyltrichloroethane | (noun) an insecticide that is also toxic to animals and humans; banned in the United States since 1972 | Synonyms: DDT |
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| dichloromethane | (noun) a nonflammable liquid used as a solvent and paint remover and refrigerant | Synonyms: methylene chloride |
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| dichondra | (noun) a creeping perennial herb with hairy stems and orbicular to reniform leaves and small white to greenish flowers; used as a grass substitute in warm regions | Synonyms: Dichondra micrantha |
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| dichotomisation | (noun) the act of dividing into two sharply different categories | Synonyms: dichotomization |
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| dichotomization | (noun) the act of dividing into two sharply different categories | Synonyms: dichotomisation |
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| dichotomy | (noun) being twofold; a classification into two opposed parts or subclasses | Synonyms: duality |
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| dichroism | (noun) pleochroism of a crystal so that it exhibits two different colors when viewed from two different directions | - |
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| dichromacy | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromasy, dichromatism, dichromatopsia, dichromia |
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| dichromasy | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromacy, dichromatism, dichromatopsia, dichromia |
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| dichromat | (noun) a person with any of the various forms of dichromacy | - |
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| dichromate | (noun) a salt of the hypothetical dichromic acid | Synonyms: bichromate |
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| dichromatism | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromacy, dichromasy, dichromatopsia, dichromia |
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| dichromatopsia | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromacy, dichromasy, dichromatism, dichromia |
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| dichromia | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromacy, dichromasy, dichromatism, dichromatopsia |
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