| adult | (adjective) (of animals) fully developed | Synonyms: big, full-grown, fully grown, grown, grownup |
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| (adjective) designed to arouse lust | Synonyms: pornographic |
| (noun) any mature animal | - |
| (noun) a fully developed person from maturity onward | Synonyms: grownup |
| 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 |
| adust | (adjective) burned brown by the sun | - |
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| (adjective) dried out by heat or excessive exposure to sunlight | Synonyms: baked, parched, scorched, sunbaked |
| 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 |
| advect | (verb) convey by horizontal mass movement of a fluid | - |
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| advent | (noun) arrival that has been awaited (especially of something momentous) | Synonyms: coming |
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| advert | (noun) a public promotion of some product or service | Synonyms: ad, advertisement, advertising, advertizement, advertizing |
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| (verb) make a more or less disguised reference to | Synonyms: allude, touch |
| (verb) make reference to | Synonyms: bring up, cite, mention, name, refer |
| (verb) give heed (to) | Synonyms: attend, give ear, hang, pay heed |
| advertent | (adjective) giving attention | Synonyms: heedful |
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| advertisement | (noun) a public promotion of some product or service | Synonyms: ad, advert, advertising, advertizement, advertizing |
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| advertizement | (noun) a public promotion of some product or service | Synonyms: ad, advert, advertisement, advertising, advertizing |
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| advisement | (noun) careful consideration | Synonyms: deliberation, weighing |
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| aerialist | (noun) an acrobat who performs in the air (as on a rope or trapeze) | - |
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| aeronaut | (noun) someone who operates an aircraft | Synonyms: aviator, flier, flyer |
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| aetiologist | (noun) a specialist in the etiology of diseases | Synonyms: etiologist |
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| affect | (noun) the conscious subjective aspect of feeling or emotion | - |
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| (verb) act physically on; have an effect upon | - |
| (verb) have an effect upon | Synonyms: bear on, bear upon, impact, touch, touch on |
| (verb) make believe with the intent to deceive | Synonyms: dissemble, feign, pretend, sham |
| (verb) have an emotional or cognitive impact upon | Synonyms: impress, move, strike |
| (verb) connect closely and often incriminatingly | Synonyms: involve, regard |
| afferent | (adjective) of nerves and nerve impulses; conveying sensory information from the sense organs to the CNS | - |
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| (noun) a nerve that passes impulses from receptors toward or to the central nervous system | Synonyms: afferent nerve, sensory nerve |
| affiant | (noun) a person who makes an affidavit | - |
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| affidavit | (noun) written declaration made under oath; a written statement sworn to be true before someone legally authorized to administer an oath | - |
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| afflict | (verb) cause physical pain or suffering in | Synonyms: smite |
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| (verb) cause great unhappiness for; distress | - |
| affluent | (adjective) having an abundant supply of money or possessions of value | Synonyms: flush, loaded, moneyed, substantial, wealthy |
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| (noun) a branch that flows into the main stream | Synonyms: confluent, feeder, tributary |
| (noun) an affluent person; a person who is financially well off | - |
| afforest | (verb) establish a forest on previously unforested land | Synonyms: forest |
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| affright | (noun) an overwhelming feeling of fear and anxiety | Synonyms: panic, terror |
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| (verb) cause fear in | Synonyms: fright, frighten, scare |
| affront | (noun) a deliberately offensive act or something producing the effect of deliberate disrespect | Synonyms: insult |
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| (verb) treat, mention, or speak to rudely | Synonyms: diss, insult |
| afloat | (adjective) borne on the water; floating | - |
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| (adjective) covered with water | Synonyms: awash, flooded, inundated, overflowing |
| (adjective) aimlessly drifting | Synonyms: adrift, aimless, directionless, planless, rudderless, undirected |
| afoot | (adjective) currently in progress | Synonyms: underway |
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| (adjective) traveling by foot | - |
| (adverb) on foot; walking | - |
| aforethought | (adjective) with planning and intention | Synonyms: planned, plotted |
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| aft | (adjective) (nautical, aeronautical) situated at or toward the stern or tail | - |
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| (adverb) at or near or toward the stern of a ship or tail of an airplane | Synonyms: abaft, astern |
| aftereffect | (noun) any result that follows its cause after an interval | - |
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| (noun) a delayed effect of a drug or therapy | - |
| aftermost | (adjective) located closest to the stern or tail | - |
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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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| 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 |
| agent | (noun) the semantic role of the animate entity that instigates or causes the happening denoted by the verb in the clause | Synonyms: agentive role |
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| (noun) an active and efficient cause; capable of producing a certain effect | - |
| (noun) a businessman who buys or sells for another in exchange for a commission | Synonyms: broker, factor |
| (noun) a representative who acts on behalf of other persons or organizations | - |
| (noun) any agent or representative of a federal agency or bureau | Synonyms: federal agent |
| (noun) a substance that exerts some force or effect | - |
| aggrandisement | (noun) the act of increasing the wealth or prestige or power or scope of something | Synonyms: aggrandizement, elevation |
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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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| aghast | (adjective) struck with fear, dread, or consternation | Synonyms: appalled, dismayed, shocked |
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| aglet | (noun) ornamental tagged cord or braid on the shoulder of a uniform | Synonyms: aiglet, aiguillette |
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| (noun) metal or plastic sheath over the end of a shoelace or ribbon | Synonyms: aiglet |
| agonist | (noun) (biochemistry) a drug that can combine with a receptor on a cell to produce a physiological reaction | - |
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| (noun) a muscle that contracts while another relaxes | - |
| (noun) someone involved in a contest or battle (as in an agon) | - |
| (noun) the principal character in a work of fiction | Synonyms: protagonist |
| agreement | (noun) compatibility of observations | Synonyms: correspondence |
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| (noun) the thing arranged or agreed to | Synonyms: arrangement |
| (noun) the verbal act of agreeing | - |
| (noun) the statement (oral or written) of an exchange of promises | Synonyms: understanding |
| (noun) the determination of grammatical inflection on the basis of word relations | Synonyms: concord |
| (noun) harmony of people's opinions or actions or characters | Synonyms: accord |
| agriculturalist | (noun) someone concerned with the science or art or business of cultivating the soil | Synonyms: agriculturist, cultivator, grower, raiser |
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| agriculturist | (noun) someone concerned with the science or art or business of cultivating the soil | Synonyms: agriculturalist, cultivator, grower, raiser |
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| agronomist | (noun) an expert in soil management and field-crop production | - |
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| aiglet | (noun) ornamental tagged cord or braid on the shoulder of a uniform | Synonyms: aglet, aiguillette |
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| (noun) metal or plastic sheath over the end of a shoelace or ribbon | Synonyms: aglet |
| aigret | (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: aigrette |
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| ailment | (noun) an often persistent bodily disorder or disease; a cause for complaining | Synonyms: complaint, ill |
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| airburst | (noun) an explosion in the atmosphere | - |
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| aircraft | (noun) a vehicle that can fly | - |
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| airfreight | (verb) transport (cargo) by air | Synonyms: air-freight, air-ship |
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| airlift | (noun) transportation of people or goods by air (especially when other means of access are unavailable) | Synonyms: lift |
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| (verb) fly people or goods to or from places not accessible by other means | Synonyms: lift |
| airport | (noun) an airfield equipped with control tower and hangars as well as accommodations for passengers and cargo | Synonyms: aerodrome, airdrome, drome |
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| airpost | (noun) a system of conveying mail by aircraft | Synonyms: airmail |
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| airt | (verb) channel into a new direction | Synonyms: redirect |
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| airtight | (adjective) having no weak points | Synonyms: air-tight |
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| (adjective) not allowing air or gas to pass in or out | Synonyms: air-tight, gas-tight |
| akvavit | (noun) Scandinavian liquor usually flavored with caraway seeds | Synonyms: aquavit |
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| alarmist | (noun) a person who alarms others needlessly | - |
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| albescent | (adjective) becoming or shading into white | - |
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| alcahest | (noun) hypothetical universal solvent once sought by alchemists | Synonyms: alkahest, universal solvent |
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| alcalescent | (adjective) tending to become alkaline; slightly alkaline | Synonyms: alkalescent |
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| alchemist | (noun) one who was versed in the practice of alchemy and who sought an elixir of life and a panacea and an alkahest and the philosopher's stone | - |
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| alecost | (noun) tansy-scented Eurasian perennial herb with buttonlike yellow flowers; used as potherb or salad green and sometimes for potpourri or tea or flavoring; sometimes placed in genus Chrysanthemum | Synonyms: balsam herb, bible leaf, Chrysanthemum balsamita, costmary, mint geranium, Tanacetum balsamita |
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| alert | (adjective) engaged in or accustomed to close observation | Synonyms: watchful |
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| (adjective) mentally perceptive and responsive | Synonyms: alive, awake |
| (adjective) quick and energetic | Synonyms: brisk, lively, merry, rattling, snappy, spanking, zippy |
| (noun) a warning serves to make you more alert to danger | Synonyms: alerting |
| (noun) an automatic signal (usually a sound) warning of danger | Synonyms: alarm, alarum, warning signal |
| (noun) condition of heightened watchfulness or preparation for action | Synonyms: qui vive |
| (verb) warn or arouse to a sense of danger or call to a state of preparedness | Synonyms: alarm |
| algebraist | (noun) a mathematician whose specialty is algebra | - |
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| alienist | (noun) a psychiatrist and specialist in the legal aspects of mental illness | - |
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| alight | (adjective) lighted up by or as by fire or flame | Synonyms: ablaze, afire, aflame, aflare, on fire |
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| (verb) come down | Synonyms: climb down |
| (verb) to come to rest, settle | Synonyms: light, perch |
| alignment | (noun) the act of adjusting or aligning the parts of a device in relation to each other | - |
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| (noun) the spatial property possessed by an arrangement or position of things in a straight line or in parallel lines | - |
| (noun) (astronomy) apparent meeting or passing of two or more celestial bodies in the same degree of the zodiac | Synonyms: conjunction |
| (noun) an organization of people (or countries) involved in a pact or treaty | Synonyms: alinement, alliance, coalition |
| aliment | (noun) a source of materials to nourish the body | Synonyms: alimentation, nourishment, nutriment, nutrition, sustenance, victuals |
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| (verb) give nourishment to | Synonyms: nourish, nutrify |
| alinement | (noun) an organization of people (or countries) involved in a pact or treaty | Synonyms: alignment, alliance, coalition |
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| aliquant | (noun) an integer that is not an exact divisor of some quantity | Synonyms: aliquant part |
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| aliquot | (adjective) signifying an exact divisor or factor of a quantity | - |
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| (noun) an integer that is an exact divisor of some quantity | Synonyms: aliquot part |
| alkahest | (noun) hypothetical universal solvent once sought by alchemists | Synonyms: alcahest, universal solvent |
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| alkalescent | (adjective) tending to become alkaline; slightly alkaline | Synonyms: alcalescent |
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| alkanet | (noun) perennial or biennial herb cultivated for its delicate usually blue flowers | Synonyms: Anchusa officinalis, bugloss |
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| allegement | (noun) statements affirming or denying certain matters of fact that you are prepared to prove | Synonyms: allegation |
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| allegiant | (adjective) steadfast in devotion (especially to your lawful monarch or government) | - |
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| allergist | (noun) a physician skilled in the diagnosis and treatment of allergies | - |
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| alleviant | (noun) remedy that alleviates pain without curing | Synonyms: alleviator, palliative |
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| allograft | (noun) tissue or organ transplanted from a donor of the same species but different genetic makeup; recipient's immune system must be suppressed to prevent rejection of the graft | Synonyms: homograft |
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| allot | (verb) allow to have | Synonyms: accord, grant |
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| (verb) give out | Synonyms: assign, portion |
| (verb) administer or bestow, as in small portions | Synonyms: administer, deal, deal out, dish out, dispense, distribute, dole out, lot, mete out, parcel out, shell out |
| allotment | (noun) the act of distributing by allotting or apportioning; distribution according to a plan | Synonyms: allocation, apportioning, apportionment, assignation, parceling, parcelling |
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| (noun) a share set aside for a specific purpose | Synonyms: allocation |
| allurement | (noun) the act of enticing a person to do something wrong (as an offer of sex in return for money) | Synonyms: solicitation |
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| (noun) the power to entice or attract through personal charm | Synonyms: allure, temptingness |
| (noun) attractiveness | - |
| almost | (adverb) (of actions or states) slightly short of or not quite accomplished; all but | Synonyms: about, most, near, nearly, nigh, virtually, well-nigh |
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| aloft | (adverb) in the higher atmosphere above the earth | - |
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| (adverb) at or to great height; high up in or into the air | - |
| (adverb) at or on or to the masthead or upper rigging of a ship | - |
| (adverb) upward | - |
| alphabet | (noun) the elementary stages of any subject (usually plural) | Synonyms: first principles, rudiments |
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| (noun) a character set that includes letters and is used to write a language | Synonyms: ABC's, ABC, ABCs |
| alpinist | (noun) a mountain climber who specializes in difficult climbs | - |
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| alright | (adjective) nonstandard usage | - |
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| (adverb) an expression of agreement normally occurring at the beginning of a sentence | Synonyms: all right, fine, OK, very well |
| (adverb) without doubt (used to reinforce an assertion) | Synonyms: all right |
| (adverb) in a satisfactory or adequate manner | Synonyms: all right, O.K., okay |
| altoist | (noun) a musician who plays the alto saxophone | Synonyms: alto saxophonist |
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| altruist | (noun) someone who makes charitable donations intended to increase human well-being | Synonyms: philanthropist |
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| alumroot | (noun) any of several herbs of the genus Heuchera | Synonyms: alumbloom |
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| amadavat | (noun) red Asian weaverbirds often kept as cage birds | Synonyms: avadavat |
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| amazement | (noun) the feeling that accompanies something extremely surprising | Synonyms: astonishment |
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| ambient | (adjective) completely enveloping | - |
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| ambit | (noun) an area in which something acts or operates or has power or control: | Synonyms: compass, orbit, range, reach, scope |
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| ambivalent | (adjective) uncertain or unable to decide about what course to follow | - |
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| ambulant | (adjective) able to walk about | Synonyms: ambulatory |
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| ameloblast | (noun) a cell from which tooth enamel develops | - |
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| amendment | (noun) the act of amending or correcting | - |
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| (noun) a statement that is added to or revises or improves a proposal or document (a bill or constitution etc.) | - |
| ament | (noun) a cylindrical spikelike inflorescence | Synonyms: catkin |
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| amercement | (noun) money extracted as a penalty | Synonyms: fine, mulct |
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| amethyst | (adjective) of a moderate purple color | - |
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| (noun) a transparent purple variety of quartz; used as a gemstone | - |
| aminoplast | (noun) a plastic (synthetic resin) made from amino compounds; used as an adhesive and as a coating for paper and textiles | Synonyms: amino plastic, amino resin |
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| amoralist | (noun) someone who adheres to the doctrine that ordinary moral distinctions are invalid | - |
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