| at | (noun) 100 at equal 1 kip in Laos | - |
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| atactic | (adjective) lacking motor coordination; marked or caused by ataxia | Synonyms: ataxic |
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| atar | (noun) essential oil or perfume obtained from flowers | Synonyms: athar, attar, ottar |
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| ataractic | (adjective) tending to soothe or tranquilize | Synonyms: ataraxic, sedative, tranquilising, tranquilizing, tranquillising, tranquillizing |
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| (noun) a drug used to reduce stress or tension without reducing mental clarity | Synonyms: antianxiety agent, ataractic agent, ataractic drug, tranquilizer, tranquilliser, tranquillizer |
| ataraxia | (noun) peace of mind | - |
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| ataraxic | (adjective) tending to soothe or tranquilize | Synonyms: ataractic, sedative, tranquilising, tranquilizing, tranquillising, tranquillizing |
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| ataraxis | (noun) the absence of mental stress or anxiety | Synonyms: heartsease, peace, peace of mind, peacefulness, repose, serenity |
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| atavism | (noun) a reappearance of an earlier characteristic | Synonyms: reversion, throwback |
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| atavist | (noun) an organism that has the characteristics of a more primitive type of that organism | Synonyms: throwback |
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| atavistic | (adjective) characteristic of an atavist | Synonyms: throwback |
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| ataxia | (noun) inability to coordinate voluntary muscle movements; unsteady movements and staggering gait | Synonyms: ataxy, dyssynergia, motor ataxia |
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| ataxic | (adjective) lacking motor coordination; marked or caused by ataxia | Synonyms: atactic |
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| ataxy | (noun) inability to coordinate voluntary muscle movements; unsteady movements and staggering gait | Synonyms: ataxia, dyssynergia, motor ataxia |
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| atelectasis | (noun) collapse of an expanded lung (especially in infants); also failure of pulmonary alveoli to expand at birth | - |
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| ateleiosis | (noun) a form of infantilism characterized by physical underdevelopment but normal intelligence | Synonyms: ateliosis |
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| ateleiotic | (adjective) of or relating to ateleiosis | - |
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| atelier | (noun) a studio especially for an artist or designer | Synonyms: artist's workroom |
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| ateliosis | (noun) a form of infantilism characterized by physical underdevelopment but normal intelligence | Synonyms: ateleiosis |
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| atenolol | (noun) an oral beta blocker (trade name Tenormin) used in treating hypertension and angina; has adverse side effects (depression and exacerbation of congestive heart failure etc.) | Synonyms: Tenormin |
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| athanor | (noun) a furnace that feeds itself so as to maintain a uniform temperature; used by alchemists | - |
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| athar | (noun) essential oil or perfume obtained from flowers | Synonyms: atar, attar, ottar |
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| atheism | (noun) a lack of belief in the existence of God or gods | - |
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| atheist | (adjective) related to or characterized by or given to atheism | Synonyms: atheistic, atheistical |
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| (noun) someone who does not believe in the existence of a god | - |
| atheistic | (adjective) related to or characterized by or given to atheism | Synonyms: atheist, atheistical |
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| (adjective) rejecting any belief in gods | Synonyms: atheistical, unbelieving |
| atheistical | (adjective) related to or characterized by or given to atheism | Synonyms: atheist, atheistic |
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| (adjective) rejecting any belief in gods | Synonyms: atheistic, unbelieving |
| 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 |
| atheneum | (noun) a place where reading materials are available | Synonyms: athenaeum |
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| (noun) a literary or scientific association for the promotion of learning | Synonyms: athenaeum |
| atherodyde | (noun) a simple type of jet engine; must be launched at high speed | Synonyms: athodyd, flying drainpipe, ramjet, ramjet engine |
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| atherogenesis | (noun) the formation of atheromas on the walls of the arteries as in atherosclerosis | - |
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| atheroma | (noun) a fatty deposit in the intima (inner lining) of an artery; can obstruct blood flow | - |
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| atheromatic | (adjective) of or relating to or resembling atheroma | Synonyms: atheromatous |
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| atheromatous | (adjective) of or relating to or resembling atheroma | Synonyms: atheromatic |
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| atherosclerosis | (noun) a stage of arteriosclerosis involving fatty deposits (atheromas) inside the arterial walls, thus narrowing the arteries | Synonyms: coronary artery disease |
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| atherosclerotic | (adjective) of or relating to atherosclerosis | - |
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| athetosis | (noun) a continuous succession of slow, writhing, involuntary movements of the hands and feet and other body parts | - |
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| athirst | (adjective) (usually followed by `for') extremely desirous | Synonyms: hungry, thirsty |
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| athlete | (noun) a person trained to compete in sports | Synonyms: jock |
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| athletic | (adjective) relating to or befitting athletics or athletes | - |
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| (adjective) vigorously active | Synonyms: acrobatic, gymnastic |
| (adjective) having a sturdy and well proportioned body | - |
| athleticism | (noun) intense energy | Synonyms: strenuosity |
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| athletics | (noun) an active diversion requiring physical exertion and competition | Synonyms: sport |
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| (noun) participation in sports events as an extracurricular activity | - |
| (noun) a contest between athletes | Synonyms: athletic competition, athletic contest |
| athodyd | (noun) a simple type of jet engine; must be launched at high speed | Synonyms: atherodyde, flying drainpipe, ramjet, ramjet engine |
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| athwart | (adverb) at an oblique angle | Synonyms: aslant, obliquely |
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| (adverb) at right angles to the center line of a ship | - |
| atilt | (adjective) departing or being caused to depart from the true vertical or horizontal | Synonyms: canted, leaning, tilted, tipped |
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| atlas | (noun) a figure of a man used as a supporting column | Synonyms: telamon |
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| (noun) the 1st cervical vertebra | Synonyms: atlas vertebra |
| (noun) a collection of maps in book form | Synonyms: book of maps, map collection |
| atm | (noun) a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade | Synonyms: atmosphere, standard atmosphere, standard pressure |
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| atmometer | (noun) an instrument that measures rate of evaporation of water | Synonyms: evaporometer |
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| atmoradiograph | (noun) a device which measures the frequency of occurrence of atmospherics. | - |
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| atmosphere | (noun) a distinctive but intangible quality surrounding a person or thing | Synonyms: air, aura |
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| (noun) the mass of air surrounding the Earth | Synonyms: air |
| (noun) the envelope of gases surrounding any celestial body | - |
| (noun) a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade | Synonyms: atm, standard atmosphere, standard pressure |
| (noun) the weather or climate at some place | Synonyms: atmospheric state |
| (noun) a particular environment or surrounding influence | Synonyms: ambiance, ambience |
| atmospheric | (adjective) relating to or located in the atmosphere | Synonyms: atmospherical |
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| atmospherical | (adjective) relating to or located in the atmosphere | Synonyms: atmospheric |
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| atmospherics | (noun) a crackling or hissing noise caused by electrical interference | Synonyms: atmospheric static, static |
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| atole | (noun) eaten as mush or as a thin gruel | - |
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| atoll | (noun) an island consisting of a circular coral reef surrounding a lagoon | - |
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| atom | (noun) (physics and chemistry) the smallest component of an element having the chemical properties of the element | - |
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| (noun) (nontechnical usage) a tiny piece of anything | Synonyms: corpuscle, molecule, mote, particle, speck |
| atomic | (adjective) (weapons) deriving destructive energy from the release of atomic energy | Synonyms: nuclear |
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| (adjective) of or relating to or comprising atoms | - |
| (adjective) immeasurably small | - |
| atomisation | (noun) separating something into fine particles | Synonyms: atomization, fragmentation |
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| (noun) annihilation by reducing something to atoms | Synonyms: atomization |
| atomise | (verb) break up into small particles | Synonyms: atomize |
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| (verb) strike at with firepower or bombs | Synonyms: atomize, nuke, zap |
| (verb) spray very finely | Synonyms: atomize |
| atomiser | (noun) a dispenser that turns a liquid (such as perfume) into a fine mist | Synonyms: atomizer, nebuliser, nebulizer, spray, sprayer |
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| atomism | (noun) (chemistry) any theory in which all matter is composed of tiny discrete finite indivisible indestructible particles | Synonyms: atomic theory, atomist theory, atomistic theory |
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| (noun) (psychology) a theory that reduces all mental phenomena to simple elements (sensations and feelings) that form complex ideas by association | - |
| atomistic | (adjective) divided into separate and often disparate elements | Synonyms: atomistical |
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| atomistical | (adjective) divided into separate and often disparate elements | Synonyms: atomistic |
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| atomization | (noun) separating something into fine particles | Synonyms: atomisation, fragmentation |
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| (noun) annihilation by reducing something to atoms | Synonyms: atomisation |
| atomize | (verb) break up into small particles | Synonyms: atomise |
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| (verb) strike at with firepower or bombs | Synonyms: atomise, nuke, zap |
| (verb) spray very finely | Synonyms: atomise |
| atomizer | (noun) a dispenser that turns a liquid (such as perfume) into a fine mist | Synonyms: atomiser, nebuliser, nebulizer, spray, sprayer |
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| atonal | (adjective) characterized by avoidance of traditional western tonality | Synonyms: unkeyed |
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| atonalism | (noun) the absence of a key; alternative to the diatonic system | Synonyms: atonality |
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| atonalistic | (adjective) of or relating to atonalism | - |
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| atonality | (noun) the absence of a key; alternative to the diatonic system | Synonyms: atonalism |
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| atonally | (adverb) without tonality | - |
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| atone | (verb) turn away from sin or do penitence | Synonyms: repent |
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| (verb) make amends for | Synonyms: aby, abye, expiate |
| atonement | (noun) the act of atoning for sin or wrongdoing (especially appeasing a deity) | Synonyms: expiation, propitiation |
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| (noun) compensation for a wrong | Synonyms: expiation, satisfaction |
| atonia | (noun) lack of normal muscular tension or tonus | Synonyms: amyotonia, atonicity, atony |
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| atonic | (adjective) (used of syllables) carrying no stress | Synonyms: unaccented |
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| (adjective) characterized by a lack of tonus | - |
| atonicity | (noun) lack of normal muscular tension or tonus | Synonyms: amyotonia, atonia, atony |
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| atony | (noun) lack of normal muscular tension or tonus | Synonyms: amyotonia, atonia, atonicity |
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| atop | (adverb) on, to, or at the top | - |
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| atopognosia | (noun) absence or loss of topognosia; inability to locate correctly a point of touch | Synonyms: atopognosis |
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| atopognosis | (noun) absence or loss of topognosia; inability to locate correctly a point of touch | Synonyms: atopognosia |
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| atopy | (noun) an allergic reaction that becomes apparent in a sensitized person only minutes after contact | Synonyms: atopic allergy, immediate allergy, type I allergic reaction |
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| atorvastatin | (noun) an oral drug (trade name Lipitor) that is effective in lowering triglycerides; potent in reducing LDL cholesterol because higher doses can be given | Synonyms: Lipitor |
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| atoxic | (adjective) not producing or resulting from poison | Synonyms: nontoxic |
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| atrabilious | (adjective) irritable as if suffering from indigestion | Synonyms: bilious, dyspeptic, liverish |
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| atrazine | (noun) a synthetic compound derived from triazine that is widely used as an agricultural herbicide | - |
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| atresia | (noun) an abnormal condition in which a normal opening or tube in the body (as the urethra) is closed or absent | - |
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| atrial | (adjective) of or relating to a cavity or chamber in the body (especially one of the upper chambers of the heart) | - |
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| atrioventricular | (adjective) relating to or affecting the atria and ventricles of the heart | Synonyms: auriculoventricular |
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| atrip | (adjective) (of an anchor) just clear of the bottom | Synonyms: aweigh |
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| atrium | (noun) the central area in a building; open to the sky | - |
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| (noun) any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart) | - |
| atrocious | (adjective) provoking horror | Synonyms: frightful, horrible, horrifying, ugly |
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| (adjective) exceptionally bad or displeasing | Synonyms: abominable, awful, dreadful, painful, terrible, unspeakable |
| (adjective) shockingly brutal or cruel | Synonyms: flagitious, grievous, monstrous |
| atrociously | (adverb) in a terrible manner | Synonyms: abominably, abysmally, awfully, rottenly, terribly |
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| (adverb) to an extravagant or immoderate degree | Synonyms: outrageously |
| atrociousness | (noun) the quality of being shockingly cruel and inhumane | Synonyms: atrocity, barbarity, barbarousness, heinousness |
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| atrocity | (noun) an act of atrocious cruelty | Synonyms: inhumanity |
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| (noun) the quality of being shockingly cruel and inhumane | Synonyms: atrociousness, barbarity, barbarousness, heinousness |
| atrophedema | (noun) recurrent large circumscribed areas of subcutaneous edema; onset is sudden and it disappears within 24 hours; seen mainly in young women, often as an allergic reaction to food or drugs | Synonyms: angioedema, giant hives, periodic edema, Quincke's edema |
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| atrophic | (adjective) relating to or characterized by atrophy | - |
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| atrophied | (adjective) (of an organ or body part) diminished in size or strength as a result of disease or injury or lack of use | Synonyms: diminished, wasted |
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| atrophy | (noun) any weakening or degeneration (especially through lack of use) | Synonyms: withering |
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| (noun) a decrease in size of an organ caused by disease or disuse | Synonyms: wasting, wasting away |
| (verb) undergo atrophy | - |
| atropine | (noun) a poisonous crystalline alkaloid extracted from the nightshade family; used as an antispasmodic and to dilate the eye pupil; also administered in large amounts as an antidote for organophosphate nerve agents or organophosphate insecticides | - |
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| attach | (verb) become attached | - |
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| (verb) cause to be attached | - |
| (verb) be attached; be in contact with | - |
| (verb) take temporary possession of as a security, by legal authority | Synonyms: confiscate, impound, seize, sequester |
| (verb) create social or emotional ties | Synonyms: bind, bond, tie |
| attachable | (adjective) capable of being fastened or added to something else | - |
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| attache | (noun) a shallow and rectangular briefcase | Synonyms: attache case |
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| (noun) a specialist assigned to the staff of a diplomatic mission | - |