| arteriography | (noun) roentgenographic examination of arteries | - |
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| arthralgia | (noun) pain in a joint or joints | - |
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| arthralgic | (adjective) of or relating to arthralgia | - |
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| arthritic | (adjective) of or pertaining to arthritis | Synonyms: creaky, rheumatic, rheumatoid, rheumy |
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| (noun) a person afflicted with arthritis | - |
| arthritis | (noun) inflammation of a joint or joints | - |
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| arthrocentesis | (noun) removal of fluid from a joint by centesis | - |
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| arthrodesis | (noun) the surgical fixation of a joint which is intended to result in bone fusion | - |
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| arthrogram | (noun) an X ray of a joint after the injection of a contrast medium | - |
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| arthrography | (noun) roentgenographic examination of a joint after injection of radiopaque contrast medium; produces an arthrogram | - |
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| arthromere | (noun) any of the segments in the body of a jointed animal like an arthropod | - |
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| arthromeric | (adjective) of or relating to one of the body segments of jointed animals | - |
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| arthropathy | (noun) a pathology or abnormality of a joint | - |
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| arthroplasty | (noun) surgical reconstruction or replacement of a malformed or degenerated joint | - |
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| arthropod | (noun) invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin | - |
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| arthropodal | (adjective) of or relating to invertebrates of the phylum Arthropoda | Synonyms: arthropodan, arthropodous |
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| arthropodan | (adjective) of or relating to invertebrates of the phylum Arthropoda | Synonyms: arthropodal, arthropodous |
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| arthropodous | (adjective) of or relating to invertebrates of the phylum Arthropoda | Synonyms: arthropodal, arthropodan |
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| arthroscope | (noun) a type of endoscope that is inserted into a joint for visual examination | - |
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| arthroscopy | (noun) a minimally invasive operation to repair a damaged joint; the surgeon examines the joint with an arthroscope while making repairs through a small incision | - |
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| arthrospore | (noun) one of a string of thick walled vegetative resting cells formed by some algae and fungi | - |
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| (noun) a body that resembles a spore but is not an endospore; produced by some bacteria | - |
| arthrosporic | (adjective) of or relating to arthrospores | Synonyms: arthrosporous |
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| arthrosporous | (adjective) of or relating to arthrospores | Synonyms: arthrosporic |
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| artichoke | (noun) a thistlelike flower head with edible fleshy leaves and heart | Synonyms: globe artichoke |
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| (noun) Mediterranean thistlelike plant widely cultivated for its large edible flower head | Synonyms: artichoke plant, Cynara scolymus, globe artichoke |
| ascolichen | (noun) a lichen in which the fungus component is an ascomycete | - |
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| ash | (noun) any of various deciduous pinnate-leaved ornamental or timber trees of the genus Fraxinus | Synonyms: ash tree |
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| (noun) strong elastic wood of any of various ash trees; used for furniture and tool handles and sporting goods such as baseball bats | - |
| (noun) the residue that remains when something is burned | - |
| (verb) convert into ashes | - |
| ashamed | (adjective) feeling shame or guilt or embarrassment or remorse | - |
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| ashamedly | (adverb) with a feeling of shame | - |
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| ashbin | (noun) a bin that holds rubbish until it is collected | Synonyms: ash-bin, ash bin, ashcan, dustbin, garbage can, trash barrel, trash bin, trash can, wastebin |
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| ashcake | (noun) corn bread wrapped in cabbage leaves and baked in hot ashes (southern) | Synonyms: ash cake, corn tash |
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| ashcan | (noun) a bin that holds rubbish until it is collected | Synonyms: ash-bin, ash bin, ashbin, dustbin, garbage can, trash barrel, trash bin, trash can, wastebin |
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| ashen | (adjective) anemic looking from illness or emotion | Synonyms: blanched, bloodless, livid, white |
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| (adjective) made of wood of the ash tree | - |
| ashlar | (noun) a rectangular block of hewn stone used for building purposes | - |
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| ashore | (adverb) towards the shore from the water | - |
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| ashram | (noun) (India) a place of religious retreat for Hindus | - |
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| (noun) a place of religious retreat modeled after the Indian ashram | - |
| ashtray | (noun) a receptacle for the ash from smokers' cigars or cigarettes | - |
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| ashy | (adjective) of a light grey | Synonyms: ash-gray, ash-grey |
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| asphalt | (noun) a dark bituminous substance found in natural beds and as residue from petroleum distillation; consists mainly of hydrocarbons | Synonyms: mineral pitch |
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| (noun) mixed asphalt and crushed gravel or sand; used especially for paving but also for roofing | - |
| (verb) cover with tar or asphalt | - |
| asphaltic | (adjective) containing asphalt | - |
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| aspheric | (adjective) varying slightly from a perfectly spherical shape | Synonyms: aspherical |
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| aspherical | (adjective) varying slightly from a perfectly spherical shape | Synonyms: aspheric |
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| asphodel | (noun) any of various chiefly Mediterranean plants of the genera Asphodeline and Asphodelus having linear leaves and racemes of white or pink or yellow flowers | - |
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| asphyxia | (noun) a condition in which insufficient or no oxygen and carbon dioxide are exchanged on a ventilatory basis; caused by choking or drowning or electric shock or poison gas | - |
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| asphyxiate | (verb) be asphyxiated; die from lack of oxygen | Synonyms: stifle, suffocate |
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| (verb) deprive of oxygen and prevent from breathing | Synonyms: smother, suffocate |
| (verb) impair the respiration of or obstruct the air passage of | Synonyms: choke, stifle, suffocate |
| asphyxiated | (adjective) in a state of asphyxia | - |
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| asphyxiating | (adjective) tending to deprive of oxygen | - |
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| asphyxiation | (noun) killing by depriving of oxygen | Synonyms: suffocation |
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| (noun) the condition of being deprived of oxygen (as by having breathing stopped) | Synonyms: suffocation |
| asphyxiator | (noun) a manually operated device for extinguishing small fires | Synonyms: extinguisher, fire extinguisher |
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| asshole | (noun) vulgar slang for anus | Synonyms: arse, arsehole, bunghole |
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| (noun) insulting terms of address for people who are stupid or irritating or ridiculous | Synonyms: bastard, cocksucker, dickhead, mother fucker, motherfucker, prick, shit, SOB, son of a bitch, whoreson |
| associateship | (noun) the position of associate (as in an office or academy) | - |
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| asthenia | (noun) an abnormal loss of strength | Synonyms: astheny |
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| asthenic | (adjective) having a slender physique | - |
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| (adjective) lacking energy or vitality | Synonyms: adynamic, debilitated, enervated |
| asthenopia | (noun) a tiredness of the eyes caused by prolonged close work by a person with an uncorrected vision problem | Synonyms: eyestrain |
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| asthenosphere | (noun) the lower layer of the crust | - |
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| astheny | (noun) an abnormal loss of strength | Synonyms: asthenia |
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| asthma | (noun) respiratory disorder characterized by wheezing; usually of allergic origin | Synonyms: asthma attack, bronchial asthma |
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| asthmatic | (adjective) relating to breathing with a whistling sound | Synonyms: wheezing, wheezy |
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| (noun) a person suffering from asthma | - |
| astonish | (verb) affect with wonder | Synonyms: amaze, astound |
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| astonished | (adjective) filled with the emotional impact of overwhelming surprise or shock | Synonyms: amazed, astonied, astounded, stunned |
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| astonishing | (adjective) so surprisingly impressive as to stun or overwhelm | Synonyms: astounding, staggering, stupefying |
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| (adjective) surprising greatly | Synonyms: amazing |
| astonishingly | (adverb) in an amazing manner; to everyone's surprise | Synonyms: amazingly, surprisingly |
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| astonishment | (noun) the feeling that accompanies something extremely surprising | Synonyms: amazement |
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| astrakhan | (noun) the fur of young lambs | - |
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| astraphobia | (noun) a morbid fear of thunder and lightning | - |
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| astrophysical | (adjective) of or concerned with astrophysics | - |
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| astrophysicist | (noun) an astronomer who studies the physical properties of celestial bodies | - |
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| astrophysics | (noun) the branch of astronomy concerned with the physical and chemical properties of celestial bodies | - |
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| asynchronism | (noun) the relation that exists when things occur at unrelated times | Synonyms: asynchrony, desynchronisation, desynchronization, desynchronizing |
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| asynchronous | (adjective) not synchronous; not occurring or existing at the same time or having the same period or phase | - |
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| (adjective) (digital communication) pertaining to a transmission technique that does not require a common clock between the communicating devices; timing signals are derived from special characters in the data stream itself | - |
| asynchrony | (noun) the relation that exists when things occur at unrelated times | Synonyms: asynchronism, desynchronisation, desynchronization, desynchronizing |
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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 | - |
| 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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| 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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