| aeromechanic | (adjective) of or pertaining to aerodynamics | - |
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| 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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| anechoic | (adjective) not having or producing echoes; sound-absorbent | - |
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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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| bechance | (verb) happen, occur, or be the case in the course of events or by chance | Synonyms: befall, happen |
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| (verb) become of; happen to | Synonyms: befall, betide |
| becharm | (verb) attract; cause to be enamored | Synonyms: beguile, bewitch, captivate, capture, catch, charm, enamor, enamour, enchant, entrance, fascinate, trance |
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| (verb) control by magic spells, as by practicing witchcraft | Synonyms: charm |
| 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 |
| beechen | (adjective) consisting of or made of wood of the beech tree | - |
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| 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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| beseech | (verb) ask for or request earnestly | Synonyms: adjure, bid, conjure, entreat, press |
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| beseeching | (adjective) begging | Synonyms: imploring, pleading |
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| beseechingly | (adverb) in a beseeching manner | Synonyms: entreatingly, imploringly, importunately, pleadingly |
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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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| breeched | (adjective) dressed in trousers | Synonyms: pantalooned, trousered |
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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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| catechetic | (adjective) of or relating to or resembling a rigorous catechism | Synonyms: catechistic |
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| (adjective) of or relating to or involving catechesis | Synonyms: catechetical |
| catechetical | (adjective) of or relating to or involving catechesis | Synonyms: catechetic |
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| catechin | (noun) a tannic acid that is extracted from black catechu as a white crystalline substance | - |
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| catechise | (verb) examine through questioning and answering | Synonyms: catechize |
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| (verb) give religious instructions to | Synonyms: catechize |
| 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 | - |
| catechismal | (adjective) of or relating to a catechism summarizing the principles of Christianity | - |
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| catechist | (noun) one who instructs catechumens in preparation for baptism (especially one using a catechism) | - |
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| catechistic | (adjective) of or relating to or resembling a rigorous catechism | Synonyms: catechetic |
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| catechize | (verb) examine through questioning and answering | Synonyms: catechise |
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| (verb) give religious instructions to | Synonyms: catechise |
| 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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| dechlorinate | (verb) remove chlorine from (water) | - |
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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 | - |
| (verb) to say again or imitate | Synonyms: repeat |
| (verb) ring or echo with sound | Synonyms: resound, reverberate, ring |
| (verb) bring to mind | Synonyms: recall |
| 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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| echoic | (adjective) (of words) formed in imitation of a natural sound | Synonyms: imitative, onomatopoeic, onomatopoeical, onomatopoetic |
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| (adjective) like or characteristic of an echo | Synonyms: echolike |
| echoing | (adjective) (of sounds) repeating by reflection | Synonyms: reechoing |
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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 | - |
| echoless | (adjective) having or producing no echo | - |
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| echolike | (adjective) like or characteristic of an echo | Synonyms: echoic |
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| 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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| echt | (adjective) not fake or counterfeit | Synonyms: genuine |
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| electromechanical | (adjective) of or relating to or involving an electrically operated mechanical device | - |
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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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| lecherous | (adjective) given to excessive indulgence in sexual activity | - |
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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 |
| (verb) draw blood | Synonyms: bleed, phlebotomise, phlebotomize |
| 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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| leechlike | (adjective) of plants or persons; having the nature or habits of a parasite or leech; living off another | Synonyms: bloodsucking, parasitic, parasitical |
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| leprechaun | (noun) a mischievous elf in Irish folklore | - |
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| mechanic | (adjective) resembling the action of a machine | - |
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| (noun) a craftsman skilled in operating machine tools | Synonyms: machinist, shop mechanic |
| (noun) someone whose occupation is repairing and maintaining automobiles | Synonyms: auto-mechanic, automobile mechanic, car-mechanic, grease monkey |
| mechanical | (adjective) using (or as if using) mechanisms or tools or devices | - |
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| (adjective) relating to or governed by or in accordance with mechanics | - |
| (adjective) relating to or concerned with machinery or tools | Synonyms: mechanically skillful, technical |
| mechanically | (adverb) in a machinelike manner; without feeling | - |
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| (adverb) in a mechanical manner; by a mechanism | Synonyms: automatically |
| 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 |
| mechanise | (verb) make mechanical | Synonyms: mechanize |
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| (verb) make monotonous; make automatic or routine | Synonyms: mechanize |
| (verb) equip with armed and armored motor vehicles | Synonyms: mechanize, motorise, motorize |
| mechanised | (adjective) equipped with machinery | Synonyms: mechanized |
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| (adjective) using vehicles | Synonyms: mechanized, motorized |
| 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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| mechanistic | (adjective) of or relating to the philosophical theory of mechanism | - |
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| (adjective) explained in terms of physical forces | - |
| mechanistically | (adverb) in a mechanistic manner | - |
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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 |
| mechanize | (verb) make mechanical | Synonyms: mechanise |
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| (verb) make monotonous; make automatic or routine | Synonyms: mechanise |
| (verb) equip with armed and armored motor vehicles | Synonyms: mechanise, motorise, motorize |
| mechanized | (adjective) equipped with machinery | Synonyms: mechanised |
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| (adjective) using vehicles | Synonyms: mechanised, motorized |
| mnemotechnic | (adjective) of or relating to or involved the practice of aiding the memory | Synonyms: mnemonic, mnemotechnical |
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| mnemotechnical | (adjective) of or relating to or involved the practice of aiding the memory | Synonyms: mnemonic, mnemotechnic |
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| 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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