| abandon | (noun) the trait of lacking restraint or control; reckless freedom from inhibition or worry | Synonyms: unconstraint, wantonness |
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| (noun) a feeling of extreme emotional intensity | Synonyms: wildness |
| (verb) leave someone who needs or counts on you; leave in the lurch | Synonyms: desert, desolate, forsake |
| (verb) stop maintaining or insisting on; of ideas or claims | Synonyms: give up |
| (verb) leave behind empty; move out of | Synonyms: empty, vacate |
| (verb) forsake, leave behind | - |
| (verb) give up with the intent of never claiming again | Synonyms: give up |
| abandoned | (adjective) forsaken by owner or inhabitants | Synonyms: derelict, deserted |
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| (adjective) unrestrained and uninhibited | - |
| abandonment | (noun) withdrawing support or help despite allegiance or responsibility | Synonyms: defection, desertion |
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| (noun) the voluntary surrender of property (or a right to property) without attempting to reclaim it or give it away | - |
| (noun) the act of giving something up | Synonyms: desertion, forsaking |
| abecedarian | (adjective) alphabetically arranged (as for beginning readers) | - |
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| (noun) a novice learning the rudiments of some subject | - |
| aberrance | (noun) a state or condition markedly different from the norm | Synonyms: aberrancy, aberration, deviance |
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| aberrancy | (noun) a state or condition markedly different from the norm | Synonyms: aberrance, aberration, deviance |
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| aberrant | (adjective) markedly different from an accepted norm | Synonyms: deviant, deviate |
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| (noun) one whose behavior departs substantially from the norm of a group | - |
| abeyance | (noun) temporary cessation or suspension | Synonyms: suspension |
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| abeyant | (adjective) inactive but capable of becoming active | Synonyms: dormant |
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| abidance | (noun) the act of abiding (enduring without yielding) | - |
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| (noun) the act of dwelling in a place | Synonyms: residence, residency |
| (noun) acting according to certain accepted standards | Synonyms: compliance, conformation, conformity |
| abradant | (noun) a tool or machine used for wearing down or smoothing or polishing | Synonyms: abrader |
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| (noun) a substance that abrades or wears down | Synonyms: abrasive, abrasive material |
| abranchial | (adjective) having no gills | Synonyms: abranchiate, abranchious, gill-less |
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| abranchiate | (adjective) having no gills | Synonyms: abranchial, abranchious, gill-less |
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| abranchious | (adjective) having no gills | Synonyms: abranchial, abranchiate, gill-less |
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| absorbance | (noun) (physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation | Synonyms: optical density, photographic density, transmission density |
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| absorptance | (noun) a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance; the fraction of incident radiant energy absorbed per unit mass or thickness of an absorber | Synonyms: absorption coefficient, coefficient of absorption |
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| abundance | (noun) the property of a more than adequate quantity or supply | Synonyms: copiousness, teemingness |
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| (noun) (chemistry) the ratio of the total mass of an element in the earth's crust to the total mass of the earth's crust; expressed as a percentage or in parts per million | - |
| (noun) (physics) the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes present | - |
| abundant | (adjective) present in great quantity | - |
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| abundantly | (adverb) in an abundant manner | Synonyms: copiously, extravagantly, profusely |
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| academician | (noun) an educator who works at a college or university | Synonyms: academic, faculty member |
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| (noun) a scholar who is skilled in academic disputation | Synonyms: schoolman |
| (noun) someone elected to honorary membership in an academy | - |
| academicianship | (noun) the position of member of an honorary academy | - |
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| acantha | (noun) any sharply pointed projection | Synonyms: spine, spur |
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| acanthion | (noun) the craniometric point at the anterior extremity of the intermaxillary suture | - |
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| acanthocephalan | (noun) any of various worms living parasitically in intestines of vertebrates having a retractile proboscis covered with many hooked spines | Synonyms: spiny-headed worm |
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| acanthocyte | (noun) an abnormal red blood cell that has thorny projections of protoplasm | - |
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| acanthocytosis | (noun) the presence of acanthocytes in the blood stream (as in abetalipoproteinemia) | - |
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| acanthoid | (adjective) shaped like a spine or thorn | Synonyms: acanthous, spinous |
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| acantholysis | (noun) a breakdown of a cell layer in the epidermis (as in pemphigus) | - |
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| acanthoma | (noun) a neoplasm originating in the epidermis | Synonyms: skin tumor |
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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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| acanthosis | (noun) an abnormal but benign thickening of the prickle-cell layer of the skin (as in psoriasis) | - |
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| acanthotic | (adjective) of or relating to or having acanthosis | - |
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| acanthous | (adjective) shaped like a spine or thorn | Synonyms: acanthoid, spinous |
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| acanthus | (noun) any plant of the genus Acanthus having large spiny leaves and spikes or white or purplish flowers; native to Mediterranean region but widely cultivated | - |
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| accelerando | (adjective) (music) gradually increasing in tempo | - |
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| (noun) a gradually increasing tempo of music | - |
| (adverb) with increasing speed | - |
| acceptance | (noun) the act of accepting with approval; favorable reception | Synonyms: acceptation, adoption, espousal |
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| (noun) the act of taking something that is offered | - |
| (noun) a disposition to tolerate or accept people or situations | Synonyms: sufferance, toleration |
| (noun) the mental attitude that something is believable and should be accepted as true | Synonyms: credence |
| (noun) (contract law) words signifying consent to the terms of an offer (thereby creating a contract) | - |
| (noun) a time draft drawn on and accepted by a bank | Synonyms: banker's acceptance |
| (noun) the state of being acceptable and accepted | - |
| acceptant | (adjective) accepting willingly | Synonyms: acceptive |
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| accompanied | (adjective) having companions or an escort | - |
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| (adjective) playing or singing with instrumental or vocal accompaniment | Synonyms: attended |
| accompaniment | (noun) the act of accompanying someone or something in order to protect them | Synonyms: escort |
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| (noun) something added to complete or embellish or make perfect | Synonyms: complement |
| (noun) a musical part (vocal or instrumental) that supports or provides background for other musical parts | Synonyms: backup, musical accompaniment, support |
| (noun) an event or situation that happens at the same time as or in connection with another | Synonyms: attendant, co-occurrence, concomitant |
| accompanist | (noun) a person who provides musical accompaniment (usually on a piano) | Synonyms: accompanyist |
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| accompany | (verb) perform an accompaniment to | Synonyms: follow, play along |
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| (verb) go or travel along with | - |
| (verb) be present or associated with an event or entity | Synonyms: attach to, come with, go with |
| (verb) be a companion to somebody | Synonyms: companion, company, keep company |
| accompanying | (adjective) occurring with or following as a consequence | Synonyms: attendant, collateral, concomitant, consequent, ensuant, incidental, resultant, sequent |
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| accompanyist | (noun) a person who provides musical accompaniment (usually on a piano) | Synonyms: accompanist |
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| accordance | (noun) the act of granting rights | Synonyms: accordance of rights |
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| (noun) concurrence of opinion | Synonyms: accord, conformity |
| accordant | (adjective) being in agreement or harmony; often followed by `with' | - |
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| (adjective) in keeping | Synonyms: agreeable, concordant, conformable, consonant |
| accountancy | (noun) the occupation of maintaining and auditing records and preparing financial reports for a business | Synonyms: accounting |
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| accountant | (noun) someone who maintains and audits business accounts | Synonyms: comptroller, controller |
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| accountantship | (noun) the position of accountant | - |
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| acetanilid | (noun) a solid odourless chemical of leaf or flake-like appearance; used in rubber accelerator, dye, and camphor synthesis; metabolised to paracetamol (acetaminophen) | Synonyms: acetanilide, phenylacetamide |
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| acetanilide | (noun) a solid odourless chemical of leaf or flake-like appearance; used in rubber accelerator, dye, and camphor synthesis; metabolised to paracetamol (acetaminophen) | Synonyms: acetanilid, phenylacetamide |
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| acoustician | (noun) a physicist who specializes in acoustics | - |
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| acquaintance | (noun) personal knowledge or information about someone or something | Synonyms: conversance, conversancy, familiarity |
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| (noun) a person with whom you are acquainted | Synonyms: friend |
| (noun) a relationship less intimate than friendship | Synonyms: acquaintanceship |
| acquaintanceship | (noun) a relationship less intimate than friendship | Synonyms: acquaintance |
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| acquittance | (noun) a legal document evidencing the discharge of a debt or obligation | Synonyms: release |
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| acroanaesthesia | (noun) loss of sensation in the extremities | Synonyms: acroanesthesia |
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| acroanesthesia | (noun) loss of sensation in the extremities | Synonyms: acroanaesthesia |
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| acrocyanosis | (noun) cyanosis of the extremities; can occur when a spasm of the blood vessels is caused by exposure to cold or by strong emotion | Synonyms: Raynaud's sign |
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| actinian | (noun) any sea anemone or related animal | Synonyms: actinia, actiniarian |
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| actiniarian | (noun) any sea anemone or related animal | Synonyms: actinia, actinian |
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| actinomyxidian | (noun) of or relating to parasites of worms | - |
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| actinozoan | (noun) sessile marine coelenterates including solitary and colonial polyps; the medusoid phase is entirely suppressed | Synonyms: anthozoan |
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| adamance | (noun) resoluteness by virtue of being unyielding and inflexible | Synonyms: obduracy, unyieldingness |
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| adamant | (adjective) impervious to pleas, persuasion, requests, reason | Synonyms: adamantine, inexorable, intransigent |
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| (noun) very hard native crystalline carbon valued as a gem | Synonyms: diamond |
| adamantine | (adjective) consisting of or having the hardness of adamant | - |
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| (adjective) having the hardness of a diamond | - |
| (adjective) impervious to pleas, persuasion, requests, reason | Synonyms: adamant, inexorable, intransigent |
| adamantly | (adverb) inflexibly; unshakably | - |
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| adjutant | (noun) large Indian stork with a military gait | Synonyms: adjutant bird, adjutant stork, Leptoptilus dubius |
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| (noun) an officer who acts as military assistant to a more senior officer | Synonyms: aide-de-camp, aide |
| adjuvant | (adjective) enhancing the action of a medical treatment | - |
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| (adjective) furnishing added support | Synonyms: accessory, adjunct, ancillary, appurtenant, auxiliary |
| (noun) an additive that enhances the effectiveness of medical treatment | - |
| adman | (noun) someone whose business is advertising | Synonyms: advertiser, advertizer |
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| admittance | (noun) the act of admitting someone to enter | Synonyms: admission |
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| (noun) the right to enter | Synonyms: access, accession, admission, entree |
| adulterant | (adjective) making impure or corrupt by adding extraneous materials | Synonyms: adulterating |
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| (noun) any substance that lessens the purity or effectiveness of a substance | Synonyms: adulterator |
| advance | (adjective) being ahead of time or need | Synonyms: beforehand |
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| (adjective) situated ahead or going before | Synonyms: advanced, in advance |
| (noun) the act of moving forward (as toward a goal) | Synonyms: advancement, forward motion, onward motion, procession, progress, progression |
| (noun) increase in price or value | Synonyms: rise |
| (noun) a tentative suggestion designed to elicit the reactions of others | Synonyms: approach, feeler, overture |
| (noun) a movement forward | Synonyms: progress, progression |
| (noun) a change for the better; progress in development | Synonyms: betterment, improvement |
| (noun) an amount paid before it is earned | Synonyms: cash advance |
| (verb) develop in a positive way | Synonyms: come along, come on, get along, get on, progress, shape up |
| (verb) rise in rate or price | Synonyms: gain |
| (verb) increase or raise | Synonyms: boost, supercharge |
| (verb) develop further | - |
| (verb) bring forward for consideration or acceptance | Synonyms: throw out |
| (verb) obtain advantages, such as points, etc. | Synonyms: gain, gain ground, get ahead, make headway, pull ahead, win |
| (verb) move forward, also in the metaphorical sense | Synonyms: go on, march on, move on, pass on, progress |
| (verb) cause to move forward | Synonyms: bring forward |
| (verb) move forward | Synonyms: set ahead |
| (verb) pay in advance | - |
| (verb) give a promotion to or assign to a higher position | Synonyms: elevate, kick upstairs, promote, raise, upgrade |
| (verb) contribute to the progress or growth of | Synonyms: boost, encourage, further, promote |
| advanced | (adjective) (of societies) highly developed especially in technology or industry | - |
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| (adjective) situated ahead or going before | Synonyms: advance, in advance |
| (adjective) ahead in development; complex or intricate | Synonyms: sophisticated |
| (adjective) far along in time | Synonyms: ripe |
| (adjective) comparatively late in a course of development | - |
| (adjective) farther along in physical or mental development | - |
| (adjective) ahead of the times | Synonyms: forward-looking, innovative, modern |
| (adjective) at a higher level in training or knowledge or skill | - |
| advancement | (noun) the act of moving forward (as toward a goal) | Synonyms: advance, forward motion, onward motion, procession, progress, progression |
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| (noun) gradual improvement or growth or development | Synonyms: progress |
| (noun) encouragement of the progress or growth or acceptance of something | Synonyms: furtherance, promotion |
| advancer | (noun) someone who advances | - |
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| advancing | (adjective) moving forward | Synonyms: forward-moving, forward |
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| advantage | (noun) the quality of having a superior or more favorable position | Synonyms: vantage |
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| (noun) benefit resulting from some event or action | Synonyms: reward |
| (noun) (tennis) first point scored after deuce | - |
| (verb) give an advantage to | - |
| advantageous | (adjective) giving an advantage | Synonyms: favorable, favourable |
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| (adjective) appropriate for achieving a particular end; implies a lack of concern for fairness | - |
| advantageously | (adverb) in a manner affording benefit or advantage | Synonyms: well |
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| advantageousness | (noun) the quality of being encouraging or promising of a successful outcome | Synonyms: favorableness, favourableness, positiveness, positivity, profitableness |
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| aeonian | (adjective) of or relating to a geological eon (longer than an era) | Synonyms: eonian |
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| (adjective) continuing forever or indefinitely | Synonyms: ageless, eonian, eternal, everlasting, perpetual, unceasing, unending |
| 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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| aeroplane | (noun) an aircraft that has a fixed wing and is powered by propellers or jets | Synonyms: airplane, plane |
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| aeschynanthus | (noun) a plant of the genus Aeschynanthus having somewhat red or orange flowers and seeds having distinctive hairs at base and apex | - |
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| aesculapian | (adjective) of or belonging to Aesculapius or the healing art | Synonyms: medical |
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| aesthetician | (noun) a philosopher who specializes in the nature of beauty | Synonyms: esthetician |
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| (noun) a worker skilled in giving beauty treatments (manicures and facials etc.) | Synonyms: esthetician |
| affiance | (verb) give to in marriage | Synonyms: betroth, engage, plight |
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| affiant | (noun) a person who makes an affidavit | - |
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| affranchise | (verb) grant freedom to; as from slavery or servitude | Synonyms: enfranchise |
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| afghan | (noun) a blanket knitted or crocheted in strips or squares; sometimes used as a shawl | - |
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| (noun) a coat made of sheepskin | Synonyms: sheepskin coat |
| afghani | (noun) the basic unit of money in Afghanistan | - |
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| agapanthus | (noun) any of various plants of the genus Agapanthus having umbels of showy blue to purple flowers | Synonyms: lily of the Nile |
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| aggrandise | (verb) add details to | Synonyms: aggrandize, blow up, dramatise, dramatize, embellish, embroider, lard, pad |
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| aggrandisement | (noun) the act of increasing the wealth or prestige or power or scope of something | Synonyms: aggrandizement, elevation |
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| aggrandize | (verb) add details to | Synonyms: aggrandise, blow up, dramatise, dramatize, embellish, embroider, lard, pad |
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| aggrandizement | (noun) the act of increasing the wealth or prestige or power or scope of something | Synonyms: aggrandisement, elevation |
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| agnathan | (noun) eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms | Synonyms: jawless fish, jawless vertebrate |
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| agranulocytic | (adjective) relating to the blood disorder of agranulocytosis | - |
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| agranulocytosis | (noun) an acute blood disorder (often caused by radiation or drug therapy) characterized by severe reduction in granulocytes | Synonyms: agranulosis, granulocytopenia |
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| agranulosis | (noun) an acute blood disorder (often caused by radiation or drug therapy) characterized by severe reduction in granulocytes | Synonyms: agranulocytosis, granulocytopenia |
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