| defecator | (noun) (obsolete) that which cleanses or purifies; especially, an apparatus for removing the feculencies of juices and syrups. | - |
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| (noun) a person who defecates | Synonyms: shitter, voider |
| defect | (noun) a mark or flaw that spoils the appearance of something (especially on a person's body) | Synonyms: blemish, mar |
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| (noun) a failing or deficiency | Synonyms: shortcoming |
| (noun) an imperfection in an object or machine | Synonyms: fault, flaw |
| (noun) an imperfection in a bodily system | - |
| defection | (noun) withdrawing support or help despite allegiance or responsibility | Synonyms: abandonment, desertion |
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| (noun) the state of having rejected your religious beliefs for your political party or a cause (often in favor of opposing beliefs or causes) | Synonyms: apostasy, renunciation |
| defectiveness | (noun) the state of being defective | Synonyms: faultiness |
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| defector | (noun) a person who abandons their duty (as on a military post) | Synonyms: deserter |
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| deflection | (noun) a turning aside (of your course or attention or concern) | Synonyms: deflexion, deviation, digression, divagation, diversion |
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| (noun) the property of being bent or deflected | Synonyms: bending, deflexion |
| (noun) the amount by which a propagating wave is bent | Synonyms: deflexion, refraction |
| (noun) the movement of the pointer or pen of a measuring instrument from its zero position | Synonyms: deflexion |
| (noun) a twist or aberration; especially a perverse or abnormal way of judging or acting | Synonyms: warp |
| deflector | (noun) a device intended to turn aside the flow of something (water or air or smoke etc) | - |
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| dejectedness | (noun) a feeling of low spirits | Synonyms: dispiritedness, downheartedness, low-spiritedness, lowness |
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| dejection | (noun) a state of melancholy depression | - |
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| (noun) solid excretory product evacuated from the bowels | Synonyms: BM, faecal matter, faeces, fecal matter, feces, ordure, stool |
| delectability | (noun) extreme appetizingness | Synonyms: deliciousness, lusciousness, toothsomeness |
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| delectation | (noun) act of receiving pleasure from something | Synonyms: enjoyment |
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| (noun) a feeling of extreme pleasure or satisfaction | Synonyms: delight |
| deprecatio | (noun) a praying against evil, against others, or oneself; a prayer for the removal of some evil. | - |
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| deprecation | (noun) the act of expressing disapproval (especially of yourself) | Synonyms: denigration |
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| (noun) a prayer to avert or remove some evil or disaster | - |
| depreciation | (noun) a decrease in price or value | - |
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| (noun) a communication that belittles somebody or something | Synonyms: derogation, disparagement |
| (noun) decrease in value of an asset due to obsolescence or use | Synonyms: wear and tear |
| depreciator | (noun) one who disparages or belittles the worth of something | Synonyms: detractor, disparager, knocker |
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| desecration | (noun) blasphemous behavior; the act of depriving something of its sacred character | Synonyms: blasphemy, profanation, sacrilege |
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| detectability | (noun) The state of being noticeable. | - |
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| detecting | (noun) a police investigation to determine the perpetrator | Synonyms: detection, detective work, sleuthing |
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| detection | (noun) the act of detecting something; catching sight of something | Synonyms: catching, espial, spotting, spying |
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| (noun) a police investigation to determine the perpetrator | Synonyms: detecting, detective work, sleuthing |
| (noun) the perception that something has occurred or some state exists | Synonyms: sensing |
| (noun) the detection that a signal is being received | Synonyms: signal detection |
| detective | (noun) a police officer who investigates crimes | Synonyms: investigator, police detective, tec |
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| (noun) an investigator engaged or employed in obtaining information not easily available to the public | - |
| detector | (noun) any device that receives a signal or stimulus (as heat or pressure or light or motion etc.) and responds to it in a distinctive manner | Synonyms: sensing element, sensor |
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| (noun) electronic equipment that detects the presence of radio signals or radioactivity | - |
| (noun) rectifier that extracts modulation from a radio carrier wave | Synonyms: demodulator |
| 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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| dielectric | (noun) a material such as glass or porcelain with negligible electrical or thermal conductivity | Synonyms: insulator, nonconductor |
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| dielectrolysis | (noun) the motion of charged particles in a colloid under the influence of an electric field; particles with a positive charge go to the cathode and negative to the anode | Synonyms: cataphoresis, electrophoresis, ionophoresis |
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| direction | (noun) the act of managing something | Synonyms: management |
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| (noun) the act of setting and holding a course | Synonyms: guidance, steering |
| (noun) a general course along which something has a tendency to develop | - |
| (noun) the concentration of attention or energy on something | Synonyms: centering, centring, focal point, focus, focusing, focussing |
| (noun) something that provides direction or advice as to a decision or course of action | Synonyms: counsel, counseling, counselling, guidance |
| (noun) a formal statement of a command or injunction to do something | Synonyms: charge, commission |
| (noun) a message describing how something is to be done | Synonyms: instruction |
| (noun) a line leading to a place or point | Synonyms: way |
| (noun) the spatial relation between something and the course along which it points or moves | - |
| directionality | (noun) the property of a microphone or antenna of being more sensitive in one direction than in another | Synonyms: directivity |
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| (noun) the property of being directional or maintaining a direction | - |
| directioner | (noun) a fan on the band One Direction | - |
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| directive | (noun) a pronouncement encouraging or banning some activity | - |
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| directiveness | (noun) the quality of being directive | Synonyms: directivity |
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| directivity | (noun) the property of a microphone or antenna of being more sensitive in one direction than in another | Synonyms: directionality |
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| (noun) the quality of being directive | Synonyms: directiveness |
| directmate | (noun) A type of problem where White, moving first, is required to checkmate Black in a specified number of moves against any defence. | - |
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| directness | (noun) trueness of course toward a goal | Synonyms: straightness |
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| (noun) the quality of being honest and straightforward in attitude and speech | Synonyms: candidness, candor, candour, forthrightness, frankness |
| director | (noun) someone who controls resources and expenditures | Synonyms: manager, managing director |
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| (noun) the person who leads a musical group | Synonyms: conductor, music director |
| (noun) someone who supervises the actors and directs the action in the production of a show | Synonyms: theater director, theatre director |
| (noun) member of a board of directors | - |
| (noun) the person who directs the making of a film | Synonyms: film director |
| directorate | (noun) a group of persons chosen to govern the affairs of a corporation or other large institution | Synonyms: board of directors |
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| directorship | (noun) the position of a director of a business concern | - |
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| directory | (noun) an alphabetical list of names and addresses | - |
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| (noun) (computer science) a listing of the files stored in memory (usually on a hard disk) | - |
| disaffection | (noun) disloyalty to the government or to established authority | - |
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| (noun) the feeling of being alienated from other people | Synonyms: alienation, estrangement |
| disconnect | (noun) an unbridgeable disparity (as from a failure of understanding) | Synonyms: disconnection, gulf |
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| disconnectedness | (noun) state of being disconnected | Synonyms: disconnection, disjunction, disjuncture |
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| disconnection | (noun) the act of breaking a connection | Synonyms: disjunction |
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| (noun) an unbridgeable disparity (as from a failure of understanding) | Synonyms: disconnect, gulf |
| (noun) state of being disconnected | Synonyms: disconnectedness, disjunction, disjuncture |
| disinfectant | (noun) an agent (as heat or radiation or a chemical) that destroys microorganisms that might carry disease | Synonyms: antimicrobial, antimicrobic, germicide |
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| disinfection | (noun) treatment to destroy harmful microorganisms | - |
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| disinfector | (noun) an apparatus for applying disinfectants. | - |
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| disrespect | (noun) a manner that is generally disrespectful and contemptuous | Synonyms: contempt |
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| (noun) a disrespectful mental attitude | - |
| (noun) an expression of lack of respect | Synonyms: discourtesy |
| dissection | (noun) cutting so as to separate into pieces | - |
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| (noun) detailed critical analysis or examination one part at a time (as of a literary work) | - |
| (noun) a minute and critical analysis | - |
| dodecagon | (noun) a twelve-sided polygon | - |
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| dodecahedron | (noun) any polyhedron having twelve plane faces | - |
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| dovecote | (noun) a birdhouse for pigeons | Synonyms: columbarium, columbary |
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| dreck | (noun) merchandise that is shoddy or inferior | Synonyms: schlock, shlock |
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| dryopithecine | (noun) considered a possible ancestor to both anthropoid apes and humans | - |
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| duodecimal | (noun) one part in twelve equal parts | Synonyms: one-twelfth, twelfth, twelfth part |
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| dyslectic | (noun) a person who has dyslexia | Synonyms: dyslexic |
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| earpiece | (noun) electro-acoustic transducer for converting electric signals into sounds; it is held over or inserted into the ear | Synonyms: earphone, headphone, phone |
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| ecarte | (noun) a card game for 2 players; played with 32 cards and king high | - |
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| eccentric | (noun) a person with an unusual or odd personality | Synonyms: eccentric person, flake, geek, oddball |
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| (noun) a person of a specified kind (usually with many eccentricities) | Synonyms: case, character, type |
| eccentricity | (noun) strange and unconventional behavior | - |
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| (noun) a circularity that has a different center or deviates from a circular path | - |
| (noun) (geometry) a ratio describing the shape of a conic section; the ratio of the distance between the foci to the length of the major axis | - |
| ecchymosis | (noun) the escape of blood from ruptured blood vessels into the surrounding tissue to form a purple or black-and-blue spot on the skin | - |
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| (noun) the purple or black-and-blue area resulting from a bruise | - |
| ecclesiastic | (noun) a clergyman or other person in religious orders | Synonyms: churchman, cleric, divine |
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| ecclesiasticism | (noun) excessive adherence to ecclesiastical forms and activities | - |
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| (noun) religion appropriate to a church and to ecclesiastical principles and practices | - |
| ecclesiology | (noun) the branch of theology concerned with the nature and the constitution and the functions of a church | - |
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| eccyesis | (noun) pregnancy resulting from gestation elsewhere than in the uterus | Synonyms: ectopic gestation, ectopic pregnancy, extrauterine gestation, extrauterine pregnancy, metacyesis |
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| ecdysiast | (noun) a performer who provides erotic entertainment by undressing to music | Synonyms: exotic dancer, peeler, stripper, striptease, striptease artist, stripteaser |
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| ecdysis | (noun) periodic shedding of the cuticle in arthropods or the outer skin in reptiles | Synonyms: molt, molting, moult, moulting |
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| ecdysteroid | (noun) #DD: The name 'ecdysteroid' refers to the insect moulting and sex hormones which include ecdysone and its homologues such as 20-hydroxyecdysone. | - |
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| ecesis | (noun) (ecology) the process by which a plant or animal becomes established in a new habitat | Synonyms: establishment |
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| echelon | (noun) a diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset | - |
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| (noun) a body of troops arranged in a line | - |
| (noun) status in a society or organization | - |
| echidna | (noun) a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to Australia | Synonyms: anteater, spiny anteater |
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| (noun) a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to New Guinea | Synonyms: anteater, spiny anteater |
| echinocactus | (noun) any cactus of the genus Echinocactus; strongly ribbed and very spiny; southwestern United States to Brazil | Synonyms: barrel cactus |
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| echinococcosis | (noun) infestation with larval echinococci (tapeworms) | Synonyms: hydatid disease, hydatidosis |
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| echinococcus | (noun) tapeworms whose larvae are parasitic in humans and domestic animals | - |
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| echinoderm | (noun) marine invertebrates with tube feet and five-part radially symmetrical bodies | - |
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| echinus | (noun) ovolo molding between the shaft and the abacus of a Doric column | - |
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| echo | (noun) an imitation or repetition | - |
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| (noun) the repetition of a sound resulting from reflection of the sound waves | Synonyms: replication, reverberation, sound reflection |
| (noun) a reflected television or radio or radar beam | - |
| (noun) a close parallel of a feeling, idea, style, etc. | - |
| (noun) a reply that repeats what has just been said | - |
| echocardiogram | (noun) a graphical image of the heart produced by an echocardiograph | - |
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| echocardiograph | (noun) a sonograph that creates an image of the heart and its abnormalities | - |
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| echocardiography | (noun) a noninvasive diagnostic procedure that uses ultrasound to study to structure and motions of the heart | - |
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| echoencephalogram | (noun) a graphical image of the brain produced by an echoencephalograph | - |
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| echoencephalograph | (noun) a sonograph that creates an image of the brain and its abnormalities | - |
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| echoencephalography | (noun) a noninvasive diagnostic procedure that uses ultrasound to study the anatomy of the brain | - |
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| echogram | (noun) an image of a structure that is produced by ultrasonography (reflections of high-frequency sound waves); used to observe fetal growth or to study bodily organs | Synonyms: sonogram |
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| echograph | (noun) An instrument used to record an echogram. | - |
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| echography | (noun) using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs | Synonyms: sonography, ultrasonography, ultrasound |
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| echolalia | (noun) (psychiatry) mechanical and meaningless repetition of the words of another person (as in schizophrenia) | - |
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| (noun) an infant's repetition of sounds uttered by others | - |
| echolocation | (noun) determining the location of something by measuring the time it takes for an echo to return from it | Synonyms: echo sounding |
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| echovirus | (noun) any of a group of viruses associated with various diseases including viral meningitis and mild respiratory disorders and diarrhea in newborn infants | - |
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| eclair | (noun) oblong cream puff | - |
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| eclampsia | (noun) a toxic condition characterized by convulsions and possibly coma during or immediately after pregnancy | - |
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| eclat | (noun) brilliant or conspicuous success or effect | - |
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| (noun) ceremonial elegance and splendor | Synonyms: pomp |
| (noun) enthusiastic approval | Synonyms: acclaim, acclamation, plaudit, plaudits |
| eclectic | (noun) someone who selects according to the eclectic method | Synonyms: eclecticist |
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| eclecticism | (noun) making decisions on the basis of what seems best instead of following some single doctrine or style | Synonyms: eclectic method |
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| eclecticist | (noun) someone who selects according to the eclectic method | Synonyms: eclectic |
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| eclipse | (noun) one celestial body obscures another | Synonyms: occultation |
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| eclipsis | (noun) omission or suppression of parts of words or sentences | Synonyms: ellipsis |
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| ecliptic | (noun) the great circle representing the apparent annual path of the sun; the plane of the Earth's orbit around the sun; makes an angle of about 23 degrees with the equator | - |
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| eclogue | (noun) a short poem descriptive of rural or pastoral life | Synonyms: bucolic, idyl, idyll |
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| ecobabble | (noun) using the technical language of ecology to make the user seem ecologically aware | - |
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