| aboriginal | (adjective) characteristic of or relating to people inhabiting a region from the beginning | Synonyms: native |
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| (adjective) having existed from the beginning; in an earliest or original stage or state | Synonyms: primaeval, primal, primeval, primordial |
| (noun) an indigenous person who was born in a particular place | Synonyms: aborigine, indigen, indigene, native |
| aborigine | (noun) an indigenous person who was born in a particular place | Synonyms: aboriginal, indigen, indigene, native |
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| acanthopterygian | (noun) a teleost fish with fins that are supported by sharp inflexible rays | Synonyms: spiny-finned fish |
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| adagio | (adjective) (of tempo) leisurely | - |
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| (noun) a slow section of a pas de deux requiring great skill and strength by the dancers | - |
| (noun) (music) a composition played in adagio tempo (slowly and gracefully) | - |
| (adverb) slowly | - |
| adelgid | (noun) any of various insects that feed and form galls on conifers | - |
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| adrenergic | (adjective) relating to epinephrine (its release or action) | Synonyms: sympathomimetic |
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| (noun) drug that has the effects of epinephrine | Synonyms: adrenergic drug |
| aegir | (noun) a high wave (often dangerous) caused by tidal flow (as by colliding tidal currents or in a narrow estuary) | Synonyms: bore, eager, eagre, tidal bore |
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| aegis | (noun) kindly endorsement and guidance | Synonyms: auspices, protection |
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| (noun) armor plate that protects the chest; the front part of a cuirass | Synonyms: breastplate, egis |
| aerodontalgia | (noun) pain in the teeth that results from a change in air pressure (as in flying or mountain climbing) | - |
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| aerological | (adjective) of or pertaining to aerology | - |
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| aerophagia | (noun) swallowing air (usually followed by belching and discomfort and flatulence) | - |
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| aetiologic | (adjective) relating to the etiology of a disease | Synonyms: aetiological, etiologic, etiological |
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| (adjective) of or relating to the philosophical study of causation | Synonyms: aetiological, etiologic, etiological |
| aetiological | (adjective) relating to the etiology of a disease | Synonyms: aetiologic, etiologic, etiological |
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| (adjective) of or relating to the philosophical study of causation | Synonyms: aetiologic, etiologic, etiological |
| aetiologist | (noun) a specialist in the etiology of diseases | Synonyms: etiologist |
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| agile | (adjective) moving quickly and lightly | Synonyms: nimble, quick, spry |
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| (adjective) mentally quick | Synonyms: nimble |
| agilely | (adverb) in a nimble or agile manner; with quickness and lightness and ease | Synonyms: nimbly |
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| agility | (noun) the gracefulness of a person or animal that is quick and nimble | Synonyms: legerity, lightness, lightsomeness, nimbleness |
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| aging | (adjective) growing old | Synonyms: ageing, senescent |
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| (noun) the organic process of growing older and showing the effects of increasing age | Synonyms: ageing, senescence |
| (noun) acquiring desirable qualities by being left undisturbed for some time | Synonyms: ageing, ripening |
| agio | (noun) a fee charged for exchanging currencies | Synonyms: agiotage, exchange premium, premium |
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| agiotage | (noun) a fee charged for exchanging currencies | Synonyms: agio, exchange premium, premium |
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| (noun) speculative dealing in stock exchange securities or foreign exchange. | - |
| agism | (noun) discrimination on the basis of a person's age | Synonyms: ageism |
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| agitate | (verb) change the arrangement or position of | Synonyms: commove, disturb, raise up, shake up, stir up, vex |
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| (verb) cause to be agitated, excited, or roused | Synonyms: charge, charge up, commove, excite, rouse, turn on |
| (verb) move very slightly | Synonyms: budge, shift, stir |
| (verb) move or cause to move back and forth | Synonyms: shake |
| (verb) try to stir up public opinion | Synonyms: foment, stir up |
| (verb) exert oneself continuously, vigorously, or obtrusively to gain an end or engage in a crusade for a certain cause or person; be an advocate for | Synonyms: campaign, crusade, fight, press, push |
| agitated | (adjective) troubled emotionally and usually deeply | - |
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| (adjective) physically disturbed or set in motion | - |
| agitating | (adjective) causing or tending to cause anger or resentment | Synonyms: agitative, provoking |
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| agitation | (noun) disturbance usually in protest | Synonyms: excitement, hullabaloo, turmoil, upheaval |
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| (noun) the act of agitating something; causing it to move around (usually vigorously) | - |
| (noun) the feeling of being agitated; not calm | - |
| (noun) a state of agitation or turbulent change or development | Synonyms: ferment, fermentation, tempestuousness, unrest |
| (noun) a mental state of extreme emotional disturbance | - |
| agitative | (adjective) causing or tending to cause anger or resentment | Synonyms: agitating, provoking |
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| agitator | (noun) one who agitates; a political troublemaker | Synonyms: fomenter |
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| agitprop | (noun) political propaganda (especially communist propaganda) communicated via art and literature and cinema | - |
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| agrobiologic | (adjective) of or pertaining to agrobiology | Synonyms: agrobiological |
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| agrobiological | (adjective) of or pertaining to agrobiology | Synonyms: agrobiologic |
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| agrologic | (adjective) of or related to agrology | Synonyms: agrological |
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| agrological | (adjective) of or related to agrology | Synonyms: agrologic |
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| albuginea | (noun) whitish tunic | - |
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| algid | (adjective) chilly | - |
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| algidity | (noun) prostration characterized by cold and clammy skin and low blood pressure | - |
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| algin | (noun) a gum used especially as a thickener or emulsifier | Synonyms: alginic acid |
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| allegiance | (noun) the act of binding yourself (intellectually or emotionally) to a course of action | Synonyms: commitment, dedication, loyalty |
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| (noun) the loyalty that citizens owe to their country (or subjects to their sovereign) | Synonyms: fealty |
| allegiant | (adjective) steadfast in devotion (especially to your lawful monarch or government) | - |
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| allergic | (adjective) characterized by or caused by allergy | - |
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| (adjective) having an allergy or peculiar or excessive susceptibility (especially to a specific factor) | Synonyms: hypersensitised, hypersensitive, hypersensitized, sensitised, sensitized, supersensitised, supersensitive, supersensitized |
| allergist | (noun) a physician skilled in the diagnosis and treatment of allergies | - |
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| almsgiver | (noun) a person who gives alms | - |
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| almsgiving | (noun) making voluntary contributions to aid the poor | Synonyms: alms-giving |
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| ambagious | (adjective) roundabout and unnecessarily wordy | Synonyms: circumlocutious, circumlocutory, periphrastic |
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| anagogic | (adjective) based on or exemplifying anagoge | Synonyms: anagogical |
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| anagogical | (adjective) based on or exemplifying anagoge | Synonyms: anagogic |
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| analogical | (adjective) expressing, composed of, or based on an analogy | - |
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| analogise | (verb) make an analogy | Synonyms: analogize |
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| analogist | (noun) someone who looks for analogies or who reasons by analogy | - |
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| analogize | (verb) make an analogy | Synonyms: analogise |
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| anesthesiologist | (noun) a specialist who administers an anesthetic to a patient before he is treated | Synonyms: anaesthetist, anesthetist |
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| angiitis | (noun) inflammation of a blood vessel or lymph duct | - |
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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 |
| anginal | (adjective) of or related to the pain of angina pectoris | Synonyms: anginose, anginous |
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| anginose | (adjective) of or related to the pain of angina pectoris | Synonyms: anginal, anginous |
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| anginous | (adjective) of or related to the pain of angina pectoris | Synonyms: anginal, anginose |
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| angiocardiogram | (noun) a series of X rays representing the action of the heart and its blood vessels after the injection of a radiopaque substance | - |
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| angiocarp | (noun) tree bearing fruit enclosed in a shell or involucre or husk | - |
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| angiocarpic | (adjective) having or being fruit enclosed in a shell or husk | Synonyms: angiocarpous |
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| angiocarpous | (adjective) having or being fruit enclosed in a shell or husk | Synonyms: angiocarpic |
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| angioedema | (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: atrophedema, giant hives, periodic edema, Quincke's edema |
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| angiogenesis | (noun) the formation of new blood vessels | - |
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| angiogram | (noun) an X-ray representation of blood vessels made after the injection of a radiopaque substance | - |
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| angiography | (noun) roentgenographic examination of blood vessels after injection of a radiopaque contrast medium; produces an angiogram | - |
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| angiohemophilia | (noun) a form of hemophilia discovered by Erik von Willebrand; a genetic disorder that is inherited as an autosomal recessive trait; characterized by a deficiency of the coagulation factor and by mucosal bleeding | Synonyms: vascular hemophilia, von Willebrand's disease |
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| angiologist | (noun) a physician who specializes in angiology | - |
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| angiology | (noun) the branch of medical science that studies the blood and lymph vessels and their disorders | - |
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| angioma | (noun) a tumor consisting of a mass of blood or lymphatic vessels | - |
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| angiomatous | (adjective) of or related to or having a tumor of the kind known as an angioma | - |
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| angiopathy | (noun) any disease of the blood vessels or lymph ducts | - |
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| angioplasty | (noun) an operation to repair a damaged blood vessel or unblock a coronary artery | - |
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| angiopteris | (noun) highly variable species of very large primitive ferns of the Pacific tropical areas with high rainfall | Synonyms: Angiopteris evecta, giant fern |
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| angiosarcoma | (noun) a rare malignant neoplasm arising from vascular tissue; usually occurs in the breast and skin and is believed to originate from the endothelial cells of blood vessels | - |
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| angioscope | (noun) a modified microscope used to study capillary vessels | - |
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| angiosperm | (noun) plants having seeds in a closed ovary | Synonyms: flowering plant |
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| angiospermous | (adjective) of or related to or characteristic of plants that are angiosperms | - |
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| angiotelectasia | (noun) dilation and enlargement of arterioles | - |
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| angiotensin | (noun) any of several vasoconstrictor substances (trade name Hypertensin) that cause narrowing of blood vessels | Synonyms: angiotonin, Hypertensin |
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| angiotonin | (noun) any of several vasoconstrictor substances (trade name Hypertensin) that cause narrowing of blood vessels | Synonyms: angiotensin, Hypertensin |
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| anthologise | (verb) compile an anthology | Synonyms: anthologize |
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| anthologist | (noun) an editor who makes selections for an anthology | - |
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| anthologize | (verb) compile an anthology | Synonyms: anthologise |
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| anthropological | (adjective) of or concerned with the science of anthropology | - |
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| anthropologism | (noun) a point of view in which human nature is exhaustively determined by the culture in which a person lives, leaving no room for human agency. | - |
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| anthropologist | (noun) a social scientist who specializes in anthropology | - |
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| anthropophagite | (noun) a person who eats human flesh | Synonyms: anthropophagus, cannibal, man-eater |
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| antiadrenergic | (adjective) relating to blocking or reducing adrenergic effects in the body | - |
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| anticholinergic | (adjective) inhibiting or blocking the action of acetylcholine at a receptor site | - |
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| (noun) a substance that opposes or blocks the action of acetylcholine | Synonyms: anticholinergic drug |
| antilogism | (noun) an inconsistent triad of propositions in logic of which two are premises of a valid syllogism while the third is the contradictory of its conclusion. | - |
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| antiphlogistic | (adjective) counteracting inflammation | - |
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| antireligiousness | (noun) The state or condition of being opposed to religion. | - |
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| aphagia | (noun) loss of the ability to swallow | - |
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| apologia | (noun) a formal written defense of something you believe in strongly | Synonyms: apology |
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| apologise | (verb) acknowledge faults or shortcomings or failing | Synonyms: apologize |
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| (verb) defend, explain, clear away, or make excuses for by reasoning | Synonyms: apologize, excuse, rationalise, rationalize |
| apologist | (noun) a person who argues to defend or justify some policy or institution | Synonyms: justifier, vindicator |
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| apologize | (verb) acknowledge faults or shortcomings or failing | Synonyms: apologise |
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| (verb) defend, explain, clear away, or make excuses for by reasoning | Synonyms: apologise, excuse, rationalise, rationalize |
| appoggiatura | (noun) an embellishing note usually written in smaller size | Synonyms: acciaccatura, grace note |
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| aquilegia | (noun) a plant of the genus Aquilegia having irregular showy spurred flowers; north temperate regions especially mountains | Synonyms: aquilege, columbine |
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| archaeologic | (adjective) related to or dealing with or devoted to archaeology | Synonyms: archaeological, archeologic, archeological |
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| archaeological | (adjective) related to or dealing with or devoted to archaeology | Synonyms: archaeologic, archeologic, archeological |
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| archaeologist | (noun) an anthropologist who studies prehistoric people and their culture | Synonyms: archeologist |
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