| andradite | (noun) a garnet consisting of calcium iron silicate and having any color ranging from yellow and green to brown and black; used as gemstone | - |
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| biquadrate | (noun) an algebraic equation or function of the fourth degree | Synonyms: biquadratic, fourth power, quartic |
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| biquadratic | (noun) a polynomial of the fourth degree | Synonyms: biquadratic polynomial, quartic polynomial |
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| (noun) an equation of the fourth degree | Synonyms: biquadratic equation |
| (noun) an algebraic equation or function of the fourth degree | Synonyms: biquadrate, fourth power, quartic |
| calliandra | (noun) any of various shrubs and small trees valued for their fine foliage and attractive spreading habit and clustered white to deep pink or red flowers | - |
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| carbohydrate | (noun) an essential structural component of living cells and source of energy for animals; includes simple sugars with small molecules as well as macromolecular substances; are classified according to the number of monosaccharide groups they contain | Synonyms: saccharide, sugar |
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| cathedra | (noun) a throne that is the official chair of a bishop | Synonyms: bishop's throne |
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| cathedral | (noun) any large and important church | - |
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| (noun) the principal Christian church building of a bishop's diocese | Synonyms: duomo |
| clepsydra | (noun) clock that measures time by the escape of water | Synonyms: water clock, water glass |
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| dehydration | (noun) the process of extracting moisture | Synonyms: desiccation, drying up, evaporation |
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| (noun) dryness resulting from the removal of water | Synonyms: desiccation |
| (noun) depletion of bodily fluids | - |
| 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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| diphenhydramine | (noun) antihistamine (trade name Benadryl) used to treat allergic reactions involving the nasal passages (hay fever) and also to treat motion sickness | Synonyms: Benadryl |
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| docudrama | (noun) a film or TV program presenting the facts about a person or event | Synonyms: documentary, documentary film, infotainment |
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| downdraft | (noun) a strong downward air current | - |
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| drab | (noun) a dull greyish to yellowish or light olive brown | Synonyms: olive drab |
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| draba | (noun) any of numerous low-growing cushion-forming plants of the genus Draba having rosette-forming leaves and terminal racemes of small flowers with scapose or leafy stems; fruit is a dehiscent oblong or linear silique | - |
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| drabness | (noun) having a drab or dowdy quality; lacking stylishness or elegance | Synonyms: dowdiness, homeliness |
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| dracaena | (noun) an agave that is often cultivated for its decorative foliage | - |
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| drachm | (noun) a unit of apothecary weight equal to an eighth of an ounce or to 60 grains | Synonyms: drachma, dram |
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| (noun) a unit of capacity or volume in the apothecary system equal to one eighth of a fluid ounce | Synonyms: fluid drachm, fluid dram, fluidram |
| (noun) a British imperial capacity measure (liquid or dry) equal to 60 minims or 3.5516 cubic centimeters | Synonyms: fluid drachm, fluid dram, fluidram |
| drachma | (noun) formerly the basic unit of money in Greece | Synonyms: Greek drachma |
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| (noun) a unit of apothecary weight equal to an eighth of an ounce or to 60 grains | Synonyms: drachm, dram |
| dracontium | (noun) any plant of the genus Dracontium; strongly malodorous tropical American plants usually with gigantic leaves | - |
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| dracunculiasis | (noun) a painful and debilitating infestation contracted by drinking stagnant water contaminated with Guinea worm larvae that can mature inside a human's abdomen until the worm emerges through a painful blister in the person's skin | Synonyms: Guinea worm, Guinea worm disease |
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| draff | (noun) the residue of malt and grain which remains in the mash-kettle after the mashing and lautering process. | Synonyms: brewer's grain, spent grain |
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| draft | (noun) the act of moving a load by drawing or pulling | Synonyms: draught, drawing |
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| (noun) a large and hurried swallow | Synonyms: draught, gulp, swig |
| (noun) compulsory military service | Synonyms: conscription, muster, selective service |
| (noun) a dose of liquid medicine | Synonyms: draught |
| (noun) a preliminary sketch of a design or picture | Synonyms: rough drawing |
| (noun) a regulator for controlling the flow of air in a fireplace | - |
| (noun) the depth of a vessel's keel below the surface (especially when loaded) | Synonyms: draught |
| (noun) any of the various versions in the development of a written work | Synonyms: draft copy |
| (noun) a serving of drink (usually alcoholic) drawn from a keg | Synonyms: draught, potation, tipple |
| (noun) a current of air (usually coming into a chimney or room or vehicle) | Synonyms: draught |
| (noun) a document ordering the payment of money; drawn by one person or bank on another | Synonyms: bill of exchange, order of payment |
| draftee | (noun) someone who is drafted into military service | Synonyms: conscript, inductee |
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| drafter | (noun) a writer of a draft | - |
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| drafting | (noun) the creation of artistic pictures or diagrams | Synonyms: draftsmanship, drawing |
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| (noun) writing a first version to be filled out and polished later | - |
| (noun) the craft of drawing blueprints | Synonyms: mechanical drawing |
| draftsman | (noun) a skilled worker who draws plans of buildings or machines | Synonyms: draftsperson, draughtsman |
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| (noun) an artist skilled at drawing | Synonyms: drawer |
| draftsmanship | (noun) the creation of artistic pictures or diagrams | Synonyms: drafting, drawing |
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| draftsperson | (noun) a skilled worker who draws plans of buildings or machines | Synonyms: draftsman, draughtsman |
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| drag | (noun) the act of dragging (pulling with force) | - |
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| (noun) a slow inhalation (as of tobacco smoke) | Synonyms: puff, pull |
| (noun) clothing that is conventionally worn by the opposite sex (especially women's clothing when worn by a man) | - |
| (noun) something tedious and boring | - |
| (noun) something that slows or delays progress | - |
| (noun) the phenomenon of resistance to motion through a fluid | Synonyms: retarding force |
| dragee | (noun) pill that is a sugar-coated medicated candy | - |
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| (noun) sugar-coated nut or fruit piece | - |
| (noun) silvery candy beads used for decorating cakes | - |
| dragger | (noun) a fishing boat that uses a trawl net or dragnet to catch fish | Synonyms: trawler |
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| (noun) someone who pulls or tugs or drags in an effort to move something | Synonyms: puller, tugger |
| dragnet | (noun) a conical fishnet dragged through the water at great depths | Synonyms: trawl, trawl net |
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| (noun) a system of coordinated measures for apprehending (criminals or other individuals) | - |
| dragoman | (noun) an interpreter and guide in the Near East; in the Ottoman Empire in the 18th and 19th centuries a translator of European languages for the Turkish and Arab authorities and most dragomans were Greek (many reached high positions in the government) | - |
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| dragon | (noun) any of several small tropical Asian lizards capable of gliding by spreading winglike membranes on each side of the body | Synonyms: flying dragon, flying lizard |
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| (noun) a fiercely vigilant and unpleasant woman | Synonyms: tartar |
| (noun) a creature of Teutonic mythology; usually represented as breathing fire and having a reptilian body and sometimes wings | Synonyms: European dragon, firedrake |
| dragonet | (noun) small often brightly colored scaleless marine bottom-dwellers; found in tropical and warm temperate waters of Europe and America | - |
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| dragonfly | (noun) slender-bodied non-stinging insect having iridescent wings that are outspread at rest; adults and nymphs feed on mosquitoes etc. | Synonyms: darning needle, devil's darning needle, mosquito hawk, sewing needle, skeeter hawk, snake doctor, snake feeder |
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| dragonhead | (noun) American herb having sharply serrate lanceolate leaves and spikes of blue to violet flowers | Synonyms: Dracocephalum parviflorum, dragon's head |
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| dragoon | (noun) a member of a European military unit formerly composed of heavily armed cavalrymen | - |
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| drain | (noun) emptying something accomplished by allowing liquid to run out of it | Synonyms: drainage |
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| (noun) a gradual depletion of energy or resources | - |
| (noun) a pipe through which liquid is carried away | Synonyms: drainpipe, waste pipe |
| (noun) tube inserted into a body cavity (as during surgery) to remove unwanted material | - |
| drainage | (noun) emptying something accomplished by allowing liquid to run out of it | Synonyms: drain |
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| drainboard | (noun) a board beside a kitchen sink and inclined to drain into the sink | Synonyms: draining board |
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| drainpipe | (noun) a pipe through which liquid is carried away | Synonyms: drain, waste pipe |
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| drainplug | (noun) a removable plug for holding water in a tub or basin | - |
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| drake | (noun) adult male of a wild or domestic duck | - |
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| dram | (noun) the basic unit of money in Armenia | - |
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| (noun) 1/16 ounce or 1.771 grams | - |
| (noun) a unit of apothecary weight equal to an eighth of an ounce or to 60 grains | Synonyms: drachm, drachma |
| drama | (noun) the quality of being arresting or highly emotional | - |
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| (noun) the literary genre of works intended for the theater | - |
| (noun) a dramatic work intended for performance by actors on a stage | Synonyms: dramatic play, play |
| (noun) an episode that is turbulent or highly emotional | Synonyms: dramatic event |
| dramatics | (noun) participation in theatrical productions as an extracurricular activity | - |
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| (noun) the art of writing and producing plays | Synonyms: dramatic art, dramaturgy, theater, theatre |
| dramatisation | (noun) a dramatic representation | Synonyms: dramatization |
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| (noun) conversion into dramatic form | Synonyms: dramatization |
| dramatist | (noun) someone who writes plays | Synonyms: playwright |
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| dramatization | (noun) a dramatic representation | Synonyms: dramatisation |
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| (noun) conversion into dramatic form | Synonyms: dramatisation |
| dramaturgy | (noun) the art of writing and producing plays | Synonyms: dramatic art, dramatics, theater, theatre |
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| drape | (noun) hanging cloth used as a blind (especially for a window) | Synonyms: curtain, drapery, mantle, pall |
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| (noun) a sterile covering arranged over a patient's body during a medical examination or during surgery in order to reduce the possibility of contamination | - |
| (noun) the manner in which fabric hangs or falls | - |
| draper | (noun) a dealer in fabrics and sewing materials (and sometimes in clothing and drygoods) | - |
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| drapery | (noun) hanging cloth used as a blind (especially for a window) | Synonyms: curtain, drape, mantle, pall |
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| (noun) cloth gracefully draped and arranged in loose folds | - |
| draught | (noun) the act of moving a load by drawing or pulling | Synonyms: draft, drawing |
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| (noun) a large and hurried swallow | Synonyms: draft, gulp, swig |
| (noun) a dose of liquid medicine | Synonyms: draft |
| (noun) the depth of a vessel's keel below the surface (especially when loaded) | Synonyms: draft |
| (noun) a serving of drink (usually alcoholic) drawn from a keg | Synonyms: draft, potation, tipple |
| (noun) a current of air (usually coming into a chimney or room or vehicle) | Synonyms: draft |
| draughts | (noun) a checkerboard game for two players who each have 12 pieces; the object is to jump over and so capture the opponent's pieces | Synonyms: checkers |
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| draughtsman | (noun) a skilled worker who draws plans of buildings or machines | Synonyms: draftsman, draftsperson |
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| draw | (noun) the act of drawing or hauling something | Synonyms: haul, haulage |
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| (noun) poker in which a player can discard cards and receive substitutes from the dealer | Synonyms: draw poker |
| (noun) (American football) the quarterback moves back as if to pass and then hands the ball to the fullback who is running toward the line of scrimmage | Synonyms: draw play |
| (noun) a golf shot that curves to the left for a right-handed golfer | Synonyms: hook, hooking |
| (noun) a playing card or cards dealt or taken from the pack | - |
| (noun) anything (straws or pebbles etc.) taken or chosen at random | Synonyms: lot |
| (noun) the finish of a contest in which the score is tied and the winner is undecided | Synonyms: standoff, tie |
| (noun) a gully that is shallower than a ravine | - |
| (noun) an entertainer who attracts large audiences | Synonyms: attracter, attraction, attractor, drawing card |
| drawback | (noun) the quality of being a hindrance | - |
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| drawbar | (noun) a strong metal bar bearing a hook to attach something to be pulled | - |
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| drawbridge | (noun) a bridge that can be raised to block passage or to allow boats or ships to pass beneath it | Synonyms: lift bridge |
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| drawee | (noun) the person (or bank) who is expected to pay a check or draft when it is presented for payment | - |
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| drawer | (noun) a boxlike container in a piece of furniture; made so as to slide in and out | - |
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| (noun) an artist skilled at drawing | Synonyms: draftsman |
| (noun) the person who writes a check or draft instructing the drawee to pay someone else | - |
| drawers | (noun) (used in the plural) underpants worn by women | Synonyms: bloomers, knickers, pants |
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| (noun) underpants worn by men | Synonyms: boxers, boxershorts, shorts, underdrawers |
| drawing | (noun) the creation of artistic pictures or diagrams | Synonyms: drafting, draftsmanship |
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| (noun) act of getting or draining something such as electricity or a liquid from a source | Synonyms: drawing off |
| (noun) players buy (or are given) chances and prizes are distributed by casting lots | Synonyms: lottery |
| (noun) the act of moving a load by drawing or pulling | Synonyms: draft, draught |
| (noun) a representation of forms or objects on a surface by means of lines | - |
| (noun) an illustration that is drawn by hand and published in a book, magazine, or newspaper | - |
| drawknife | (noun) a woodworker's knife to shave surfaces | Synonyms: drawshave |
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| drawl | (noun) a slow speech pattern with prolonged vowels | - |
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| drawler | (noun) someone who speaks with a drawl | - |
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| drawnwork | (noun) ornamental needlework done by drawing threads to form lacelike patterns | - |
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| drawshave | (noun) a woodworker's knife to shave surfaces | Synonyms: drawknife |
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| drawstring | (noun) a tie consisting of a cord that goes through a seam around an opening | Synonyms: drawing string, string |
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| dray | (noun) a low heavy horse cart without sides; used for haulage | Synonyms: camion |
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| drayhorse | (noun) draft horse kept for pulling carts | Synonyms: cart horse, carthorse |
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| ephedra | (noun) jointed and nearly leafless desert shrub having reduced scalelike leaves and reddish fleshy seeds | Synonyms: joint fir |
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| firedrake | (noun) a creature of Teutonic mythology; usually represented as breathing fire and having a reptilian body and sometimes wings | Synonyms: dragon, European dragon |
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| fluidram | (noun) a unit of capacity or volume in the apothecary system equal to one eighth of a fluid ounce | Synonyms: drachm, fluid drachm, fluid dram |
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| (noun) a British imperial capacity measure (liquid or dry) equal to 60 minims or 3.5516 cubic centimeters | Synonyms: drachm, fluid drachm, fluid dram |
| fundraiser | (noun) a social function that is held for the purpose of raising money | - |
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| (noun) someone who solicits financial contributions | - |
| guardrail | (noun) a railing placed alongside a stairway or road for safety | Synonyms: safety rail |
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| handrail | (noun) a railing at the side of a staircase or balcony to prevent people from falling | Synonyms: balusters, balustrade, banister, bannister |
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| headrace | (noun) a waterway that feeds water to a mill or water wheel or turbine | - |
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| hemidrachm | (noun) an ancient Greek silver coin equal to 1/2 drachm or 3 obols in value. | - |
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| hindrance | (noun) the act of hindering or obstructing or impeding | Synonyms: hinderance, interference |
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| (noun) any obstruction that impedes or is burdensome | Synonyms: encumbrance, hinderance, hitch, incumbrance, interference, preventative, preventive |
| (noun) something immaterial that interferes with or delays action or progress | Synonyms: balk, baulk, check, deterrent, handicap, hinderance, impediment |
| hydra | (noun) small tubular solitary freshwater hydrozoan polyp | - |
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| (noun) trouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive quality | - |
| hydralazine | (noun) an antihypertensive drug (trade name Apresoline) that dilates blood vessels; used (often with a diuretic) to treat hypertension and congestive heart failure | Synonyms: Apresoline |
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| hydramnios | (noun) an abnormality of pregnancy; accumulation of excess amniotic fluid | - |
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| hydrangea | (noun) any of various deciduous or evergreen shrubs of the genus Hydrangea | - |
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| hydrant | (noun) a discharge pipe with a valve and spout at which water may be drawn from the mains of waterworks | - |
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| (noun) a faucet for drawing water from a pipe or cask | Synonyms: tap, water faucet, water tap |
| hydrargyrum | (noun) a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures | Synonyms: atomic number 80, Hg, mercury, quicksilver |
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| hydrarthrosis | (noun) inflammation and swelling of a movable joint because of excess synovial fluid | - |
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| hydrate | (noun) any compound that contains water of crystallization | - |
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| hydration | (noun) the process of combining with water; usually reversible | - |
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| hydraulics | (noun) study of the mechanics of fluids | Synonyms: fluid mechanics |
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| hydrazide | (noun) any of a class of organic compounds sharing a common functional group characterized by a nitrogen to nitrogen covalent bond with 4 substituents with at least one of them being an acyl group. | - |
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| hydrazine | (noun) a colorless fuming corrosive liquid; a powerful reducing agent; used chiefly in rocket fuels | - |
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| hydrazoite | (noun) a salt of hydrazoic acid | - |
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| linendraper | (noun) a retail dealer in yard goods | - |
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| madras | (noun) a light patterned cotton cloth | - |
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| madrasa | (noun) Muslim schools in Bangladesh and Pakistan | Synonyms: madrasah |
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| madrasah | (noun) Muslim schools in Bangladesh and Pakistan | Synonyms: madrasa |
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