| aeromechanics | (noun) the branch of mechanics that deals with the motion of gases (especially air) and their effects on bodies in the flow | Synonyms: aerodynamics |
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| antechamber | (noun) a large entrance or reception room or area | Synonyms: anteroom, entrance hall, foyer, hall, lobby, vestibule |
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| bechamel | (noun) milk thickened with a butter and flour roux | Synonyms: bechamel sauce, white sauce |
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| beech | (noun) any of several large deciduous trees with rounded spreading crowns and smooth grey bark and small sweet edible triangular nuts enclosed in burs; north temperate regions | Synonyms: beech tree |
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| (noun) wood of any of various beech trees; used for flooring and containers and plywood and tool handles | Synonyms: beechwood |
| beechnut | (noun) small sweet triangular nut of any of various beech trees | - |
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| beechwood | (noun) wood of any of various beech trees; used for flooring and containers and plywood and tool handles | Synonyms: beech |
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| beseechingness | (noun) The state or quality of one who begs or implores. | - |
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| biotech | (noun) the branch of molecular biology that studies the use of microorganisms to perform specific industrial processes | Synonyms: biotechnology |
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| biotechnology | (noun) the branch of engineering science in which biological science is used to study the relation between workers and their environments | Synonyms: bioengineering, ergonomics |
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| (noun) the branch of molecular biology that studies the use of microorganisms to perform specific industrial processes | Synonyms: biotech |
| breech | (noun) opening in the rear of the barrel of a gun where bullets can be loaded | Synonyms: rear of barrel, rear of tube |
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| breechblock | (noun) a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing | Synonyms: breech closer |
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| breechcloth | (noun) a garment that provides covering for the loins | Synonyms: breechclout, loincloth |
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| breechclout | (noun) a garment that provides covering for the loins | Synonyms: breechcloth, loincloth |
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| breeches | (noun) (used in the plural) trousers ending above the knee | Synonyms: knee breeches, knee pants, knickerbockers, knickers |
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| breechloader | (noun) a gun that is loaded at the breech | - |
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| caleche | (noun) the folding hood of a horse-drawn carriage | Synonyms: calash, calash top |
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| (noun) a woman's large folded hooped hood; worn in the 18th century | Synonyms: calash |
| catechesis | (noun) oral religious instruction (as before baptism or confirmation) | - |
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| catechin | (noun) a tannic acid that is extracted from black catechu as a white crystalline substance | - |
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| catechism | (noun) an elementary book summarizing the principles of a Christian religion; written as questions and answers | - |
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| (noun) a series of questions put to an individual (such as a political candidate) to elicit their views | - |
| catechist | (noun) one who instructs catechumens in preparation for baptism (especially one using a catechism) | - |
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| catecholamine | (noun) any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland | - |
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| catechu | (noun) East Indian spiny tree having twice-pinnate leaves and yellow flowers followed by flat pods; source of black catechu | Synonyms: Acacia catechu, Jerusalem thorn |
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| (noun) extract of the heartwood of Acacia catechu used for dyeing and tanning and preserving fishnets and sails; formerly used medicinally | Synonyms: black catechu |
| catechumen | (noun) a new convert being taught the principles of Christianity by a catechist | Synonyms: neophyte |
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| chokecherry | (noun) a common wild cherry of eastern North America having small bitter black berries favored by birds | Synonyms: chokecherry tree, Prunus virginiana |
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| (noun) the fruit of the chokecherry tree | - |
| creche | (noun) a hospital where foundlings (infant children of unknown parents) are taken in and cared for | Synonyms: foundling hospital |
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| (noun) a representation of Christ's nativity in the stable at Bethlehem | - |
| cromlech | (noun) a prehistoric megalithic tomb typically having two large upright stones and a capstone | Synonyms: dolmen, portal tomb |
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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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| entelechy | (noun) (Aristotle) the state of something that is fully realized; actuality as opposed to potentiality | - |
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| gelechiid | (noun) small slender-winged moths whose larvae are agricultural pests | Synonyms: gelechiid moth |
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| horseleech | (noun) any of several large freshwater leeches | - |
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| lech | (noun) man with strong sexual desires | Synonyms: lecher, letch, satyr |
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| lechatelierite | (noun) colorless glass made of almost pure silica | Synonyms: crystal, quartz, quartz glass, vitreous silica |
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| lecher | (noun) man with strong sexual desires | Synonyms: lech, letch, satyr |
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| lecherousness | (noun) a strong sexual desire | Synonyms: lust, lustfulness |
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| lechery | (noun) unrestrained indulgence in sexual activity | - |
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| lechwe | (noun) tawny-colored African antelope inhabiting wet grassy plains; a threatened species | Synonyms: Kobus leche |
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| leech | (noun) carnivorous or bloodsucking aquatic or terrestrial worms typically having a sucker at each end | Synonyms: bloodsucker, hirudinean |
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| (noun) a follower who hangs around a host (without benefit to the host) in hope of gain or advantage | Synonyms: parasite, sponge, sponger |
| leechee | (noun) Chinese fruit having a thin brittle shell enclosing a sweet jellylike pulp and a single seed; often dried | Synonyms: lichee, lichi, litchee, litchi, litchi nut, lychee |
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| leprechaun | (noun) a mischievous elf in Irish folklore | - |
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| mechanic | (noun) a craftsman skilled in operating machine tools | Synonyms: machinist, shop mechanic |
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| (noun) someone whose occupation is repairing and maintaining automobiles | Synonyms: auto-mechanic, automobile mechanic, car-mechanic, grease monkey |
| mechanics | (noun) the technical aspects of doing something | Synonyms: mechanism |
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| (noun) the branch of physics concerned with the motion of bodies in a frame of reference | - |
| mechanisation | (noun) the act of implementing the control of equipment with advanced technology; usually involving electronic hardware | Synonyms: automation, mechanization |
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| (noun) the condition of having a highly technical implementation | Synonyms: mechanization |
| mechanism | (noun) the technical aspects of doing something | Synonyms: mechanics |
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| (noun) device consisting of a piece of machinery; has moving parts that perform some function | - |
| (noun) (philosophy) the philosophical theory that all phenomena can be explained in terms of physical or biological causes | - |
| (noun) a natural object resembling a machine in structure or function | - |
| (noun) the atomic process that occurs during a chemical reaction | Synonyms: chemical mechanism |
| mechanist | (noun) a philosopher who subscribes to the doctrine of mechanism | - |
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| mechanization | (noun) the act of implementing the control of equipment with advanced technology; usually involving electronic hardware | Synonyms: automation, mechanisation |
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| (noun) the condition of having a highly technical implementation | Synonyms: mechanisation |
| nanotechnology | (noun) the branch of engineering that deals with things smaller than 100 nanometers (especially with the manipulation of individual molecules) | - |
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| nebbech | (noun) (Yiddish) a timid unfortunate simpleton | Synonyms: nebbish |
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| obeche | (noun) large west African tree having large palmately lobed leaves and axillary cymose panicles of small white flowers and one-winged seeds; yields soft white to pale yellow wood | Synonyms: arere, obechi, samba, Triplochiton scleroxcylon |
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| (noun) the wood of an African obeche tree; used especially for veneering | - |
| obechi | (noun) large west African tree having large palmately lobed leaves and axillary cymose panicles of small white flowers and one-winged seeds; yields soft white to pale yellow wood | Synonyms: arere, obeche, samba, Triplochiton scleroxcylon |
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| pantechnicon | (noun) a large moving van (especially one used for moving furniture) | - |
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| perleche | (noun) a disorder of the lips marked by scaling and fissures at the corners of the mouth; caused by a deficiency of riboflavin | Synonyms: cheilosis |
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| petechia | (noun) a minute red or purple spot on the surface of the skin as the result of tiny hemorrhages of blood vessels in the skin (as in typhoid fever) | - |
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| photomechanics | (noun) the technique of using photomechanical methods to make photographs into plates for printing | - |
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| (noun) the process whereby printing surfaces (plates or cylinders) are produced by photographic methods | Synonyms: photoplate making |
| polytechnic | (noun) a technical school offering instruction in many industrial arts and applied sciences | Synonyms: engineering school, polytechnic institute |
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| prechlorination | (noun) chlorination prior to another chemical process | - |
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| pyrotechnic | (noun) (usually plural) a device with an explosive that burns at a low rate and with colored flames; can be used to illuminate areas or send signals etc. | Synonyms: firework |
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| pyrotechnics | (noun) the craft of making fireworks | Synonyms: pyrotechny |
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| (noun) (music) brilliance of display (as in the performance of music) | - |
| pyrotechny | (noun) the craft of making fireworks | Synonyms: pyrotechnics |
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| rechauffe | (noun) warmed leftovers | - |
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| repechage | (noun) a race (especially in rowing) in which runners-up in the eliminating heats compete for a place in the final race | - |
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| screech | (noun) sharp piercing cry | Synonyms: scream, screaming, screeching, shriek, shrieking |
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| (noun) a high-pitched noise resembling a human cry | Synonyms: scream, screaming, screeching, shriek, shrieking |
| screecher | (noun) someone who communicates vocally in a very loud voice | Synonyms: bawler, bellower, roarer, screamer, shouter, yeller |
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| screeching | (noun) sharp piercing cry | Synonyms: scream, screaming, screech, shriek, shrieking |
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| (noun) a high-pitched noise resembling a human cry | Synonyms: scream, screaming, screech, shriek, shrieking |
| servomechanism | (noun) control system that converts a small mechanical motion into one requiring much greater power; may include a negative feedback system | Synonyms: servo, servosystem |
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| speech | (noun) the mental faculty or power of vocal communication | Synonyms: language |
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| (noun) (language) communication by word of mouth | Synonyms: language, oral communication, speech communication, spoken communication, spoken language, voice communication |
| (noun) the act of delivering a formal spoken communication to an audience | Synonyms: address |
| (noun) words making up the dialogue of a play | Synonyms: actor's line, words |
| (noun) a lengthy rebuke | Synonyms: lecture, talking to |
| (noun) the exchange of spoken words | - |
| (noun) your characteristic style or manner of expressing yourself orally | Synonyms: delivery, manner of speaking |
| (noun) something spoken | - |
| speechifier | (noun) a person who delivers a speech or oration | Synonyms: orator, public speaker, rhetorician, speechmaker |
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| speechlessness | (noun) the property of being speechless | - |
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| speechmaker | (noun) a person who delivers a speech or oration | Synonyms: orator, public speaker, rhetorician, speechifier |
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| speechmaking | (noun) delivering an address to a public audience | Synonyms: oral presentation, public speaking, speaking |
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| speechwriter | (noun) a writer who composes speeches for others to deliver | - |
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| sprechgesang | (noun) a style of dramatic vocalization between singing and speaking | Synonyms: sprechstimme |
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| sprechstimme | (noun) a style of dramatic vocalization between singing and speaking | Synonyms: sprechgesang |
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| steeplechase | (noun) a horse race over an obstructed course | - |
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| (noun) a footrace of usually 3000 meters over a closed track with hurdles and a water jump | - |
| steeplechaser | (noun) a horse trained to run in steeplechases | - |
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| stonechat | (noun) common European chat with black plumage and a reddish-brown breast | Synonyms: Saxicola torquata |
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| synechia | (noun) adhesions between the iris and the lens or cornea resulting from trauma or eye surgery or as a complication of glaucoma or cataract; can lead to blindness | - |
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| tech | (noun) a school teaching mechanical and industrial arts and the applied sciences | Synonyms: technical school |
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| techie | (noun) a technician who is highly proficient and enthusiastic about some technical field (especially computing) | Synonyms: tekki |
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| technetium | (noun) a crystalline metallic element not found in nature; occurs as one of the fission products of uranium | Synonyms: atomic number 43, Tc |
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| technical | (noun) (basketball) a foul that can be assessed on a player or a coach or a team for unsportsmanlike conduct; does not usually involve physical contact during play | Synonyms: technical foul |
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| (noun) a pickup truck with a gun mounted on it | - |
| technicality | (noun) a specific detail in a set of rules or terms belonging to a particular field | - |
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| (noun) the state of being technical as in the use of technical terms or methods | - |