| adopter | (noun) a person who adopts a child of other parents as his or her own child | Synonyms: adoptive parent |
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| adrenosterone | (noun) a steroid having androgenic activity; obtained from the cortex of the adrenal gland | - |
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| adscripted | (adjective) (used of persons) bound to a tract of land; hence their service is transferable from owner to owner | Synonyms: adscript |
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| adsorbate | (adjective) capable of being adsorbed or accumulated on a surface of a solid | Synonyms: adsorbable |
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| (noun) a material that has been or is capable of being adsorbed | - |
| adulate | (verb) flatter in an obsequious manner | - |
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| 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 |
| adulterate | (adjective) mixed with impurities | Synonyms: adulterated, debased |
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| (verb) corrupt, debase, or make impure by adding a foreign or inferior substance; often by replacing valuable ingredients with inferior ones | Synonyms: debase, dilute, load, stretch |
| adulterated | (adjective) mixed with impurities | Synonyms: adulterate, debased |
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| adulterating | (adjective) making impure or corrupt by adding extraneous materials | Synonyms: adulterant |
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| adulteration | (noun) the act of adulterating (especially the illicit substitution of one substance for another) | - |
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| (noun) being mixed with extraneous material; the product of adulterating | Synonyms: debasement |
| adulterator | (noun) a changer who lessens the purity or effectiveness of a substance | - |
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| (noun) any substance that lessens the purity or effectiveness of a substance | Synonyms: adulterant |
| adulterer | (noun) someone who commits adultery or fornication | Synonyms: fornicator |
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| adulteress | (noun) a woman adulterer | Synonyms: fornicatress, hussy, jade, loose woman, slut, strumpet, trollop |
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| adulterine | (adjective) conceived in adultery | - |
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| adulterous | (adjective) characterized by adultery | Synonyms: extracurricular, extramarital |
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| (adjective) not faithful to a spouse or lover | Synonyms: cheating, two-timing |
| adulterously | (adverb) in an adulterous manner | - |
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| adulterousness | (noun) The quality of being adulterous, involving sexual intercourse by a married person with someone other than their spouse. | - |
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| adultery | (noun) extramarital sex that willfully and maliciously interferes with marriage relations | Synonyms: criminal conversation, fornication |
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| adumbrate | (verb) describe roughly or briefly or give the main points or summary of | Synonyms: outline, sketch |
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| (verb) give to understand | Synonyms: insinuate, intimate |
| advertence | (noun) the process of being heedful | Synonyms: advertency |
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| advertency | (noun) the process of being heedful | Synonyms: advertence |
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| advertent | (adjective) giving attention | Synonyms: heedful |
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| advertently | (adverb) in a careful deliberate manner | Synonyms: heedfully, mindfully |
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| advocate | (noun) a person who pleads for a cause or propounds an idea | Synonyms: advocator, exponent, proponent |
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| (noun) a lawyer who pleads cases in court | Synonyms: counsel, counsellor, counselor-at-law, counselor, pleader |
| (verb) push for something | Synonyms: recommend, urge |
| (verb) speak, plead, or argue in favor of | Synonyms: preach |
| aerate | (verb) aerate (sewage) so as to favor the growth of organisms that decompose organic matter | Synonyms: activate |
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| (verb) impregnate, combine, or supply with oxygen | Synonyms: oxygenate, oxygenise, oxygenize |
| (verb) expose to fresh air | Synonyms: air, air out |
| aerated | (adjective) supplied with carbon dioxide | Synonyms: charged |
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| (adjective) (of a liquid) treated by having air passed or bubbled through it for purification | - |
| aerolite | (noun) a stony meteorite consisting of silicate minerals | - |
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| aerophilatelic | (adjective) of or relating to airmail stamps | - |
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| aerophilately | (noun) the collection and study of airmail stamps | - |
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| aerophyte | (noun) plant that derives moisture and nutrients from the air and rain; usually grows on another plant but not parasitic on it | Synonyms: air plant, epiphyte, epiphytic plant |
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| aesthete | (noun) one who professes great sensitivity to the beauty of art and nature | Synonyms: esthete |
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| aestivate | (verb) sleep during summer | Synonyms: estivate |
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| affected | (adjective) acted upon; influenced | - |
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| (adjective) speaking or behaving in an artificial way to make an impression | Synonyms: unnatural |
| (adjective) being excited or provoked to the expression of an emotion | Synonyms: moved, stirred, touched |
| affectedly | (adverb) in an affected manner | - |
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| affectedness | (noun) a deliberate pretense or exaggerated display | Synonyms: affectation, mannerism, pose |
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| (noun) the quality of being false or artificial (as to impress others) | - |
| affectionate | (adjective) having or displaying warmth or affection | Synonyms: fond, lovesome, tender |
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| affectionately | (adverb) with affection | Synonyms: dear, dearly |
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| affectionateness | (noun) a quality proceeding from feelings of affection or love | Synonyms: fondness, lovingness, warmth |
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| (noun) a positive feeling of liking | Synonyms: affection, fondness, heart, philia, tenderness, warmheartedness, warmness |
| affiliate | (noun) a subsidiary or subordinate organization that is affiliated with another organization | - |
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| (noun) a subordinate or subsidiary associate; a person who is affiliated with another or with an organization | - |
| (verb) join in an affiliation | - |
| (verb) keep company with; hang out with | Synonyms: associate, assort, consort |
| affiliated | (adjective) being joined in close association | Synonyms: attached, connected |
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| afflicted | (adjective) grievously affected especially by disease | Synonyms: stricken |
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| (adjective) mentally or physically unfit | Synonyms: impaired |
| affricate | (noun) a composite speech sound consisting of a stop and a fricative articulated at the same point (as `ch' in `chair' and `j' in `joy') | Synonyms: affricate consonant, affricative |
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| aflutter | (adjective) excited in anticipation | Synonyms: nervous |
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| after | (adjective) located farther aft | - |
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| (adverb) behind or in the rear | - |
| (adverb) happening at a time subsequent to a reference time | Synonyms: afterward, afterwards, later, later on, subsequently |
| afterbirth | (noun) the placenta and fetal membranes that are expelled from the uterus after the baby is born | - |
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| afterburner | (noun) a device that injects fuel into a hot exhaust for extra thrust | - |
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| aftercare | (noun) care and treatment of a convalescent patient | - |
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| afterdamp | (noun) a toxic mixture of gases (including carbon dioxide and carbon monoxide and nitrogen) after an explosion of firedamp in a mine | - |
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| afterdeck | (noun) a deck abaft of midships | - |
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| aftereffect | (noun) any result that follows its cause after an interval | - |
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| (noun) a delayed effect of a drug or therapy | - |
| afterglow | (noun) the pleasure of remembering some pleasant event | - |
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| (noun) a glow sometimes seen in the sky after sunset | - |
| afterimage | (noun) an image (usually a negative image) that persists after stimulation has ceased | Synonyms: aftersensation |
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| afterlife | (noun) life after death | Synonyms: hereafter |
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| aftermath | (noun) the outcome of an event especially as relative to an individual | Synonyms: consequence |
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| (noun) the consequences of an event (especially a catastrophic event) | Synonyms: backwash, wake |
| aftermost | (adjective) located closest to the stern or tail | - |
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| afternoon | (noun) a conventional expression of greeting or farewell, used to wish someone a good afternoon | Synonyms: good afternoon |
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| (noun) the part of the day between noon and evening | - |
| afterpains | (noun) pains felt by a woman after her baby is born; associated with contractions of the uterus | - |
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| afterpiece | (noun) a brief dramatic piece (usually comic) presented after a play | - |
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| afters | (noun) a dish served as the last course of a meal | Synonyms: dessert, sweet |
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| aftersensation | (noun) an image (usually a negative image) that persists after stimulation has ceased | Synonyms: afterimage |
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| aftershaft | (noun) a supplementary feather (usually small) on the underside of the base of the shaft of some feathers in some birds | - |
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| aftershafted | (adjective) having an aftershaft (a small feather at the base of some feathers) | - |
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| aftershock | (noun) a tremor (or one of a series of tremors) occurring after the main shock of an earthquake | - |
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| aftertaste | (noun) an afterimage of a taste | - |
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| afterthought | (noun) an addition that was not included in the original plan | - |
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| (noun) thinking again about a choice previously made | Synonyms: reconsideration, rethink, second thought |
| afterward | (adverb) happening at a time subsequent to a reference time | Synonyms: after, afterwards, later, later on, subsequently |
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| afterwards | (adverb) happening at a time subsequent to a reference time | Synonyms: after, afterward, later, later on, subsequently |
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| afterworld | (noun) the place where you are after you die | - |
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| agamete | (noun) an asexual reproductive cell | - |
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| agate | (noun) an impure form of quartz consisting of banded chalcedony; used as a gemstone and for making mortars and pestles | - |
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| agateware | (noun) pottery that is veined and mottled to resemble agate | - |
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| agglomerate | (adjective) clustered together but not coherent | Synonyms: agglomerated, agglomerative, clustered |
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| (noun) a collection of objects laid on top of each other | Synonyms: cumulation, cumulus, heap, mound, pile |
| (noun) volcanic rock consisting of large fragments fused together | - |
| (verb) form into one cluster | - |
| agglomerated | (adjective) clustered together but not coherent | Synonyms: agglomerate, agglomerative, clustered |
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| agglutinate | (adjective) united as if by glue | Synonyms: agglutinative |
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| (verb) clump together; as of bacteria, red blood cells, etc. | - |
| (verb) string together (morphemes in an agglutinating language) | - |
| aggravate | (verb) make worse | Synonyms: exacerbate, exasperate, worsen |
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| (verb) exasperate or irritate | Synonyms: exacerbate, exasperate |
| aggravated | (adjective) incited, especially deliberately, to anger | Synonyms: provoked |
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| (adjective) made more severe or intense especially in law | - |
| aggregate | (adjective) composed of a dense cluster of separate units such as carpels or florets or drupelets | - |
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| (adjective) formed of separate units gathered into a mass or whole | Synonyms: aggregated, aggregative, mass |
| (noun) the whole amount | Synonyms: sum, total, totality |
| (noun) a sum total of many heterogenous things taken together | Synonyms: congeries, conglomeration |
| (noun) material such as sand or gravel used with cement and water to make concrete, mortar, or plaster | - |
| (verb) gather in a mass, sum, or whole | Synonyms: combine |
| (verb) amount in the aggregate to | - |
| aggregated | (adjective) formed of separate units gathered into a mass or whole | Synonyms: aggregate, aggregative, mass |
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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 | - |
| aglitter | (adjective) having brief brilliant points or flashes of light | Synonyms: coruscant, fulgid, glinting, glistering, glittering, glittery, scintillant, scintillating, sparkly |
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| agnate | (adjective) related on the father's side | Synonyms: agnatic, paternal |
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| (noun) one related on the father's side | Synonyms: patrikin, patrilineal kin, patrilineal sib, patrisib |
| aguacate | (noun) a pear-shaped tropical fruit with green or blackish skin and rich yellowish pulp enclosing a single large seed | Synonyms: alligator pear, avocado, avocado pear |
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| aigrette | (noun) a long plume (especially one of egret feathers) worn on a hat or a piece of jewelry in the shape of a plume | Synonyms: aigret |
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| aiguillette | (noun) ornamental tagged cord or braid on the shoulder of a uniform | Synonyms: aglet, aiglet |
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| akaryocyte | (noun) a cell without a nucleus (as an erythrocyte) | Synonyms: acaryote, akaryote |
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| akaryote | (noun) a cell without a nucleus (as an erythrocyte) | Synonyms: acaryote, akaryocyte |
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| alabaster | (adjective) of or resembling alabaster | Synonyms: alabastrine |
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| (noun) a very light white | - |
| (noun) a compact fine-textured, usually white gypsum used for carving | - |
| (noun) a hard compact kind of calcite | Synonyms: Mexican onyx, onyx marble, oriental alabaster |
| alate | (adjective) (of seeds or insects) having winglike extensions | Synonyms: alated |
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| alated | (adjective) (of seeds or insects) having winglike extensions | Synonyms: alate |
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| albite | (noun) a widely distributed feldspar that forms rocks | Synonyms: white feldspar |
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| albuterol | (noun) a bronchodilator (trade names Ventolin or Proventil) used for asthma and emphysema and other lung conditions; available in oral or inhalant forms; side effects are tachycardia and shakiness | Synonyms: Proventil, Ventolin |
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| aldosterone | (noun) a corticosteroid hormone that is secreted by the cortex of the adrenal gland; regulates salt (sodium and potassium) and water balance | - |
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| aldosteronism | (noun) a condition caused by overproduction of aldosterone | Synonyms: hyperaldosteronism |
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| aldotetrose | (noun) A four-carbon aldose; for example, threose, erythrose. | - |
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| alendronate | (noun) a tablet (trade name Fosamax) prescribed to prevent or treat osteoporosis in women after menopause | Synonyms: Fosamax |
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| alexandrite | (noun) a green variety of chrysoberyl used as a gemstone | - |
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| algometer | (noun) device for measuring pain caused by pressure | - |
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| alienate | (verb) arouse hostility or indifference in where there had formerly been love, affection, or friendliness | Synonyms: disaffect, estrange |
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| (verb) make withdrawn or isolated or emotionally dissociated | - |
| (verb) transfer property or ownership | Synonyms: alien |
| alienated | (adjective) caused to be unloved | Synonyms: estranged |
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| (adjective) socially disoriented | Synonyms: anomic, disoriented |