| anastalsis | (noun) muscular action of the alimentary tract in a direction opposite to peristalsis | - |
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| anastigmat | (noun) compound lens or lens system designed to be free of astigmatism and able to form approximately point images | - |
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| anastomosis | (noun) a natural or surgical joining of parts or branches of tubular structures so as to make or become continuous | Synonyms: inosculation |
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| anastrophe | (noun) the reversal of the normal order of words | Synonyms: inversion |
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| anastylosis | (noun) the archeological reassembly of ruined monuments from fallen or decayed fragments (incorporating new materials when necessary) | - |
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| anathema | (noun) a formal ecclesiastical curse accompanied by excommunication | - |
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| (noun) a detested person | Synonyms: bete noire |
| anathematisation | (noun) the formal act of pronouncing (someone or something) accursed | Synonyms: anathematization |
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| anathematization | (noun) the formal act of pronouncing (someone or something) accursed | Synonyms: anathematisation |
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| anatomical | (noun) an expression that relates to anatomy | Synonyms: anatomical reference |
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| anatomist | (noun) an expert in anatomy | - |
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| anatomy | (noun) a detailed analysis | - |
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| (noun) alternative names for the body of a human being | Synonyms: bod, build, chassis, figure, flesh, form, frame, human body, material body, physical body, physique, shape, soma |
| (noun) the branch of morphology that deals with the structure of animals | Synonyms: general anatomy |
| anatotitan | (noun) one of the largest and most famous duck-billed dinosaurs | - |
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| anatoxin | (noun) a bacterial toxin that has been weakened until it is no longer toxic but is strong enough to induce the formation of antibodies and immunity to the specific disease caused by the toxin | Synonyms: toxoid |
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| andrena | (noun) a bee that is a member of the genus Andrena | Synonyms: andrenid, mining bee |
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| angina | (noun) any disease of the throat or fauces marked by spasmodic attacks of intense suffocative pain | - |
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| (noun) a heart condition marked by paroxysms of chest pain due to reduced oxygen to the heart | Synonyms: angina pectoris |
| anna | (noun) a former copper coin of Pakistan and India | - |
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| annalism | (noun) The writing of annals. | - |
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| annalist | (noun) a historian who writes annals | - |
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| annals | (noun) a chronological account of events in successive years | Synonyms: chronological record |
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| (noun) reports of the work of a society or learned body etc | - |
| antenna | (noun) one of a pair of mobile appendages on the head of e.g. insects and crustaceans; typically sensitive to touch and taste | Synonyms: feeler |
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| (noun) an electrical device that sends or receives radio or television signals | Synonyms: aerial, transmitting aerial |
| (noun) sensitivity similar to that of a receptor organ | Synonyms: feeler |
| antiphonal | (noun) bound collection of antiphons | Synonyms: antiphonary |
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| antiphonary | (noun) bound collection of antiphons | Synonyms: antiphonal |
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| apadana | (noun) the great hall in ancient Persian palaces | - |
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| apanage | (noun) a grant (by a sovereign or a legislative body) of resources to maintain a dependent member of a ruling family | Synonyms: appanage |
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| (noun) any customary and rightful perquisite appropriate to your station in life | Synonyms: appanage |
| appanage | (noun) a grant (by a sovereign or a legislative body) of resources to maintain a dependent member of a ruling family | Synonyms: apanage |
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| (noun) any customary and rightful perquisite appropriate to your station in life | Synonyms: apanage |
| appurtenance | (noun) a supplementary component that improves capability | Synonyms: accessory, add-on, supplement |
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| (noun) equipment consisting of miscellaneous articles needed for a particular operation or sport etc. | Synonyms: gear, paraphernalia |
| aquanaut | (noun) an underwater swimmer equipped with a face mask and foot fins and either a snorkel or an air cylinder | Synonyms: skin-diver |
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| (noun) a skilled worker who can live in underwater installations and participate in scientific research | Synonyms: oceanaut |
| archidiaconate | (noun) office or position of an archdeacon | - |
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| arena | (noun) a playing field where sports events take place | Synonyms: scene of action |
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| (noun) a large structure for open-air sports or entertainments | Synonyms: bowl, sports stadium, stadium |
| (noun) the central area of an ancient Roman amphitheater where contests and spectacles were held; especially an area that was strewn with sand | - |
| (noun) a particular environment or walk of life | Synonyms: area, domain, field, orbit, sphere |
| arenavirus | (noun) animal viruses belonging to the family Arenaviridae | - |
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| argonaut | (noun) someone engaged in a dangerous but potentially rewarding adventure | - |
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| arsenal | (noun) a military structure where arms and ammunition and other military equipment are stored and training is given in the use of arms | Synonyms: armory, armoury |
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| (noun) a place where arms are manufactured | Synonyms: armory, armoury |
| (noun) all the weapons and equipment that a country has | Synonyms: armory, armoury |
| arsenate | (noun) a salt or ester of arsenic acid | - |
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| asana | (noun) (Hinduism) a posture or manner of sitting (as in the practice of yoga) | - |
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| asparaginase | (noun) antineoplastic drug (trade name Elspar) sometimes used to treat lymphoblastic leukemia | Synonyms: Elspar |
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| assassination | (noun) murder of a public figure by surprise attack | - |
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| (noun) an attack intended to ruin someone's reputation | Synonyms: blackwash, character assassination |
| assassinator | (noun) a murderer (especially one who kills a prominent political figure) who kills by a surprise attack and often is hired to do the deed | Synonyms: assassin, bravo |
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| assignation | (noun) a secret rendezvous (especially between lovers) | Synonyms: tryst |
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| (noun) the act of distributing by allotting or apportioning; distribution according to a plan | Synonyms: allocation, allotment, apportioning, apportionment, parceling, parcelling |
| assonance | (noun) the repetition of similar vowels in the stressed syllables of successive words | Synonyms: vowel rhyme |
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| astrodynamics | (noun) the branch of astronomy that studies the motion of natural and artificial bodies in space | - |
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| astronaut | (noun) a person trained to travel in a spacecraft | Synonyms: cosmonaut, spaceman |
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| astronautics | (noun) the theory and practice of navigation through air or space | Synonyms: aeronautics |
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| astronavigation | (noun) navigating according to the positions of the stars | Synonyms: celestial navigation |
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| athenaeum | (noun) a place where reading materials are available | Synonyms: atheneum |
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| (noun) a literary or scientific association for the promotion of learning | Synonyms: atheneum |
| atonalism | (noun) the absence of a key; alternative to the diatonic system | Synonyms: atonality |
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| atonality | (noun) the absence of a key; alternative to the diatonic system | Synonyms: atonalism |
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| attainability | (noun) the state of being achievable | Synonyms: achievability, attainableness |
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| attainableness | (noun) the state of being achievable | Synonyms: achievability, attainability |
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| avifauna | (noun) the birds of a particular region or period | - |
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| ayapana | (noun) low spreading tropical American shrub with long slender leaves used to make a mildly stimulating drink resembling tea; sometimes placed in genus Eupatorium | Synonyms: Ayapana triplinervis, Eupatorium aya-pana |
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| aztreonam | (noun) an antibiotic (trade name Azactam) used against severe infections; has minimal side effects | Synonyms: Azactam |
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| bacchanal | (noun) a wild gathering involving excessive drinking and promiscuity | Synonyms: bacchanalia, debauch, debauchery, drunken revelry, orgy, riot, saturnalia |
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| (noun) someone who engages in drinking bouts | Synonyms: bacchant, drunken reveler, drunken reveller |
| (noun) a drunken reveller; a devotee of Bacchus | Synonyms: bacchant |
| bacchanalia | (noun) a wild gathering involving excessive drinking and promiscuity | Synonyms: bacchanal, debauch, debauchery, drunken revelry, orgy, riot, saturnalia |
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| badinage | (noun) frivolous banter | - |
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| ballerina | (noun) a female ballet dancer | Synonyms: danseuse |
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| banality | (noun) a trite or obvious remark | Synonyms: bromide, cliche, commonplace, platitude |
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| banana | (noun) elongated crescent-shaped yellow fruit with soft sweet flesh | - |
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| (noun) any of several tropical and subtropical treelike herbs of the genus Musa having a terminal crown of large entire leaves and usually bearing hanging clusters of elongated fruits | Synonyms: banana tree |
| bandana | (noun) large and brightly colored handkerchief; often used as a neckerchief | Synonyms: bandanna |
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| bandanna | (noun) large and brightly colored handkerchief; often used as a neckerchief | Synonyms: bandana |
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| barnacle | (noun) marine crustaceans with feathery food-catching appendages; free-swimming as larvae; as adults form a hard shell and live attached to submerged surfaces | Synonyms: cirriped, cirripede |
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| (noun) European goose smaller than the brant; breeds in the far north | Synonyms: barnacle goose, Branta leucopsis |
| baronage | (noun) the peers of a kingdom considered as a group | Synonyms: peerage |
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| bastinado | (noun) a form of torture in which the soles of the feet are beaten with whips or cudgels | Synonyms: falanga |
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| (noun) a cudgel used to give someone a beating on the soles of the feet | - |
| bastnaesite | (noun) a yellow-to-brown mineral that is a source of rare earth elements | Synonyms: bastnasite |
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| bastnasite | (noun) a yellow-to-brown mineral that is a source of rare earth elements | Synonyms: bastnaesite |
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| bearnaise | (noun) a sauce like hollandaise but made with white wine and tarragon and shallots instead of lemon juice | - |
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| belladonna | (noun) an alkaloidal extract or tincture of the poisonous belladonna plant that is used medicinally | - |
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| (noun) perennial Eurasian herb with reddish bell-shaped flowers and shining black berries; extensively grown in United States; roots and leaves yield atropine | Synonyms: Atropa belladonna, belladonna plant, deadly nightshade |
| benignancy | (noun) the quality of being kind and gentle | Synonyms: benignity, graciousness |
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| bicarbonate | (noun) a salt of carbonic acid (containing the anion HCO3) in which one hydrogen atom has been replaced; an acid carbonate | Synonyms: hydrogen carbonate |
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| bicentenary | (noun) the 200th anniversary (or the celebration of it) | Synonyms: bicentennial |
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| billionaire | (noun) a very rich person whose material wealth is valued at more than a billion dollars | - |
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| bimillenary | (noun) a span of 2000 years | Synonyms: bimillennium |
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| (noun) the 2000th anniversary (or the celebration of it) | Synonyms: bimillennium |
| binary | (noun) a pre-compiled, pre-linked program that is ready to run under a given operating system; a binary for one operating system will not run on a different operating system | Synonyms: binary program |
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| (noun) a system of two stars that revolve around each other under their mutual gravitation | Synonyms: binary star, double star |
| binnacle | (noun) a nonmagnetic housing for a ship's compass (usually in front of the helm) | - |
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| biodynamics | (noun) the branch of biology dealing with energy or the activity of living organisms. | - |
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| blacksnake | (noun) blackish racer of the eastern United States that grows to six feet | Synonyms: black racer, Coluber constrictor |
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| (noun) large harmless shiny black North American snake | Synonyms: black rat snake, Elaphe obsoleta, mountain blacksnake, pilot blacksnake |
| bologna | (noun) large smooth-textured smoked sausage of beef and veal and pork | Synonyms: Bologna sausage |
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| bombination | (noun) sound of rapid vibration | Synonyms: bombilation, buzz |
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| bonanza | (noun) a sudden happening that brings good fortune (as a sudden opportunity to make money) | Synonyms: boom, bunce, godsend, gold rush, gravy, manna from heaven, windfall |
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| (noun) an especially rich vein of precious ore | - |
| bonavist | (noun) perennial twining vine of Old World tropics having trifoliate leaves and racemes of fragrant purple pea-like flowers followed by maroon pods of edible seeds; grown as an ornamental and as a vegetable on the Indian subcontinent; sometimes placed in genus Dolichos | Synonyms: Dolichos lablab, Egyptian bean, hyacinth bean, Indian bean, Lablab purpureus |
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| brandysnap | (noun) a gingersnap flavored with brandy | - |
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| buna | (noun) made by polymerizing butadiene | Synonyms: buna rubber |
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| burnability | (noun) the quality of being capable of igniting and burning | Synonyms: combustibility, combustibleness |
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| byname | (noun) a familiar name for a person (often a shortened version of a person's given name) | Synonyms: cognomen, moniker, nickname, sobriquet, soubriquet |
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| cabana | (noun) a small tent used as a dressing room beside the sea or a swimming pool | - |
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| cachinnation | (noun) loud convulsive laughter | - |
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| calcination | (noun) the conversion of metals into their oxides as a result of heating to a high temperature | - |
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| campana | (noun) the shape of a bell | Synonyms: bell, bell shape |
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| canafistola | (noun) deciduous or semi-evergreen tree having scented sepia to yellow flowers in drooping racemes and pods whose pulp is used medicinally; tropical Asia and Central and South America and Australia | Synonyms: canafistula, Cassia fistula, drumstick tree, golden shower tree, pudding pipe tree, purging cassia |
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| canafistula | (noun) deciduous or semi-evergreen tree having scented sepia to yellow flowers in drooping racemes and pods whose pulp is used medicinally; tropical Asia and Central and South America and Australia | Synonyms: canafistola, Cassia fistula, drumstick tree, golden shower tree, pudding pipe tree, purging cassia |
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| canal | (noun) long and narrow strip of water made for boats or for irrigation | - |
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| (noun) a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance | Synonyms: channel, duct, epithelial duct |
| (noun) (astronomy) an indistinct surface feature of Mars once thought to be a system of channels; they are now believed to be an optical illusion | - |
| canaliculus | (noun) a small canal or duct as in some bones and parts of plants | - |
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| canalisation | (noun) the production of a canal or a conversion to canals | Synonyms: canalization |
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| (noun) management through specified channels of communication | Synonyms: canalization, channelisation, channelization |
| canalization | (noun) the production of a canal or a conversion to canals | Synonyms: canalisation |
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| (noun) management through specified channels of communication | Synonyms: canalisation, channelisation, channelization |
| canape | (noun) an appetizer consisting usually of a thin slice of bread or toast spread with caviar or cheese or other savory food | - |
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| canard | (noun) a deliberately misleading fabrication | - |
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| canary | (noun) any of several small Old World finches | Synonyms: canary bird |
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| (noun) a moderate yellow with a greenish tinge | Synonyms: canary yellow |
| (noun) a female singer | - |
| (noun) someone acting as an informer or decoy for the police | Synonyms: fink, sneak, sneaker, snitch, snitcher, stool pigeon, stoolie, stoolpigeon |
| canasta | (noun) a form of rummy using two decks of cards and four jokers; jokers and deuces are wild; the object is to form groups of the same rank | Synonyms: basket rummy, meld |
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| canavanine | (noun) an amino acid found in the jack bean | - |
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| canna | (noun) any plant of the genus Canna having large sheathing leaves and clusters of large showy flowers | - |
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| cannabin | (noun) a resin obtained from the hemp plant; thought to be the active narcotic agent in marijuana | Synonyms: cannabis resin |
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