| amadavat | (noun) red Asian weaverbirds often kept as cage birds | Synonyms: avadavat |
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| amalgamation | (noun) the combination of two or more commercial companies | Synonyms: merger, uniting |
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| amalgamator | (noun) a businessman who arranges an amalgamation of two or more commercial companies | - |
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| amaranth | (noun) any of various plants of the genus Amaranthus having dense plumes of green or red flowers; often cultivated for food | - |
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| (noun) seed of amaranth plants used as a native cereal in Central and South America | - |
| amaretto | (noun) an Italian almond liqueur | - |
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| amastia | (noun) absence of the mammary glands (either through surgery or developmental defect) | - |
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| amateur | (noun) someone who pursues a study or sport as a pastime | - |
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| (noun) an athlete who does not play for pay | - |
| amateurishness | (noun) something that demonstrates a lack of professional competency | - |
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| amateurism | (noun) the conviction that people should participate in sports as a hobby (for the fun of it) rather than for money | - |
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| amativeness | (noun) the arousal of feelings of sexual desire | Synonyms: amorousness, eroticism, erotism, sexiness |
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| amatungulu | (noun) very large closely branched South African shrub having forked bright green spines and shiny leaves | Synonyms: Carissa grandiflora, Carissa macrocarpa, natal plum |
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| amazement | (noun) the feeling that accompanies something extremely surprising | Synonyms: astonishment |
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| ambidexterity | (noun) the property of being equally skillful with each hand | Synonyms: ambidextrousness |
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| ambidextrousness | (noun) the property of being equally skillful with each hand | Synonyms: ambidexterity |
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| ambiguity | (noun) unclearness by virtue of having more than one meaning | Synonyms: equivocalness |
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| (noun) an expression whose meaning cannot be determined from its context | - |
| 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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| ambition | (noun) a strong drive for success | Synonyms: ambitiousness |
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| (noun) a cherished desire | Synonyms: aspiration, dream |
| ambitiousness | (noun) a strong drive for success | Synonyms: ambition |
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| amblygonite | (noun) a white or grey mineral consisting of lithium aluminum phosphate; a source of lithium | - |
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| amboceptor | (noun) an immune body formed in the blood during infection or immunization that serves to link the complement to the antigen. | - |
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| ambulation | (noun) walking about | - |
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| ambulatory | (noun) a covered walkway (as in a cloister) | - |
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| ambystomid | (noun) small to moderate-sized terrestrial or semiaquatic New World salamander | Synonyms: ambystomid salamander |
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| amelioration | (noun) the act of relieving ills and changing for the better | Synonyms: betterment, melioration |
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| ameloblast | (noun) a cell from which tooth enamel develops | - |
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| amenability | (noun) the trait of being cooperative | Synonyms: amenableness, cooperativeness |
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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.) | - |
| amenities | (noun) things that make you comfortable and at ease | Synonyms: comforts, conveniences, creature comforts |
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| amenity | (noun) pleasantness resulting from agreeable conditions | Synonyms: agreeableness |
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| ament | (noun) a cylindrical spikelike inflorescence | Synonyms: catkin |
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| amentia | (noun) extreme mental retardation | Synonyms: idiocy |
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| amercement | (noun) money extracted as a penalty | Synonyms: fine, mulct |
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| amethopterin | (noun) toxic antimetabolite that limits cellular reproduction by acting as an antagonist to folic acid; used to treat certain cancers and psoriasis and rheumatoid arthritis | Synonyms: methotrexate, methotrexate sodium |
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| amethyst | (noun) a transparent purple variety of quartz; used as a gemstone | - |
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| ametria | (noun) congenital absence of the uterus | - |
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| ametropia | (noun) (ophthalmology) faulty refraction of light rays in the eye as in astigmatism or myopia | - |
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| amiability | (noun) a disposition to be friendly and approachable (easy to talk to) | Synonyms: affability, affableness, amiableness, bonhomie, geniality |
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| (noun) a cheerful and agreeable mood | Synonyms: good humor, good humour, good temper |
| amicability | (noun) having a disposition characterized by warmth and friendliness | Synonyms: amicableness |
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| (noun) a disinclination to quarrel | Synonyms: amicableness |
| aminomethane | (noun) a methyl with the hydrogen atom replaced by an amino radical | - |
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| 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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| aminotransferase | (noun) a class of transferases that catalyze transamination (that transfer an amino group from an amino acid to another compound) | Synonyms: aminopherase, transaminase |
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| amitosis | (noun) the direct method of cell division characterized by simple division of the nucleus without formation of chromosomes | - |
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| amitriptyline | (noun) a tricyclic antidepressant drug (trade name Elavil) with serious side effects; interacts with many other medications | Synonyms: amitriptyline hydrochloride, Elavil |
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| amity | (noun) a cordial disposition | Synonyms: cordiality |
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| (noun) a state of friendship and cordiality | - |
| ammeter | (noun) a meter that measures the flow of electrical current in amperes | - |
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| ammonification | (noun) impregnation with ammonia or a compound of ammonia | - |
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| ammonite | (noun) one of the coiled chambered fossil shells of extinct mollusks | Synonyms: ammonoid |
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| ammunition | (noun) projectiles to be fired from a gun | Synonyms: ammo |
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| (noun) information that can be used to attack or defend a claim or argument or viewpoint | - |
| (noun) any nuclear or chemical or biological material that can be used as a weapon of mass destruction | - |
| amnesty | (noun) the formal act of liberating someone | Synonyms: free pardon, pardon |
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| (noun) a warrant granting release from punishment for an offense | Synonyms: pardon |
| (noun) a period during which offenders are exempt from punishment | - |
| amniocentesis | (noun) (pregnancy) extraction by centesis of amniotic fluid from a pregnant woman (after the 15th week of pregnancy) to aid in the diagnosis of fetal abnormalities | Synonyms: amnio |
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| amniote | (noun) any member of the Amniota | - |
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| amobarbital | (noun) a barbiturate with sedative and hypnotic effects; used to relieve insomnia and as an anticonvulsant | - |
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| amoralist | (noun) someone who adheres to the doctrine that ordinary moral distinctions are invalid | - |
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| amorality | (noun) the quality of being amoral | - |
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| amorist | (noun) one dedicated to love and lovemaking especially one who writes about love | - |
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| amortisation | (noun) payment of an obligation in a series of installments or transfers | Synonyms: amortization |
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| (noun) the reduction of the value of an asset by prorating its cost over a period of years | Synonyms: amortization |
| amortization | (noun) payment of an obligation in a series of installments or transfers | Synonyms: amortisation |
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| (noun) the reduction of the value of an asset by prorating its cost over a period of years | Synonyms: amortisation |
| amount | (noun) how much there is or how many there are of something that you can quantify | Synonyms: measure, quantity |
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| (noun) the relative magnitude of something with reference to a criterion | - |
| (noun) a quantity obtained by the addition of a group of numbers | Synonyms: sum, total |
| (noun) a quantity of money | Synonyms: amount of money, sum, sum of money |
| amphetamine | (noun) a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression | Synonyms: pep pill, speed, upper |
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| amphibolite | (noun) a metamorphic rock composed chiefly of amphibole and plagioclase | - |
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| amphictyony | (noun) an association of neighboring states or tribes in ancient Greece; established originally to defend a common religious center | - |
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| amphitheater | (noun) an oval large stadium with tiers of seats; an arena in which contests and spectacles are held | Synonyms: amphitheatre, coliseum |
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| (noun) a sloping gallery with seats for spectators (as in an operating room or theater) | Synonyms: amphitheatre |
| amphitheatre | (noun) an oval large stadium with tiers of seats; an arena in which contests and spectacles are held | Synonyms: amphitheater, coliseum |
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| (noun) a sloping gallery with seats for spectators (as in an operating room or theater) | Synonyms: amphitheater |
| ampholyte | (noun) A substance that acts as a base or an acid, depending on the pH of the solution into which it is introduced. | Synonyms: amphoteric electrolyte |
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| amphotericin | (noun) an antibiotic and antifungal agent | - |
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| amplification | (noun) (electronics) the act of increasing voltage or power or current | - |
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| (noun) addition of extra material or illustration or clarifying detail | Synonyms: elaboration |
| (noun) the amount of increase in signal power or voltage or current expressed as the ratio of output to input | Synonyms: gain |
| amplitude | (noun) greatness of magnitude | - |
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| (noun) the property of copious abundance | Synonyms: bountifulness, bounty |
| (noun) (physics) the maximum displacement of a periodic wave | - |
| amputation | (noun) a surgical removal of all or part of a limb | - |
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| (noun) a condition of disability resulting from the loss of one or more limbs | - |
| amputator | (noun) a surgeon who removes part or all of a limb | - |
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| amputee | (noun) someone who has had a limb removed by amputation | - |
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| amulet | (noun) a trinket or piece of jewelry usually hung about the neck and thought to be a magical protection against evil or disease | Synonyms: talisman |
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| amusement | (noun) an activity that is diverting and that holds the attention | Synonyms: entertainment |
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| (noun) a feeling of delight at being entertained | - |
| amygdalotomy | (noun) psychosurgery in which amygdaloid fibers that mediate limbic system activity are severed (in cases of extreme uncontrollable violence) | - |
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| amyotonia | (noun) lack of normal muscular tension or tonus | Synonyms: atonia, atonicity, atony |
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| amyotrophia | (noun) progressive wasting of muscle tissues | Synonyms: amyotrophy |
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| amyotrophy | (noun) progressive wasting of muscle tissues | Synonyms: amyotrophia |
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| anacoluthia | (noun) an abrupt change within a sentence from one syntactic structure to another | Synonyms: anacoluthon |
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| anacoluthon | (noun) an abrupt change within a sentence from one syntactic structure to another | Synonyms: anacoluthia |
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| anaesthesia | (noun) loss of bodily sensation with or without loss of consciousness | Synonyms: anesthesia |
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| anaesthetic | (noun) a drug that causes temporary loss of bodily sensations | Synonyms: anaesthetic agent, anesthetic, anesthetic agent |
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| anaesthetist | (noun) a specialist who administers an anesthetic to a patient before he is treated | Synonyms: anesthesiologist, anesthetist |
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| anagnost | (noun) a cleric in the minor orders of the Eastern Orthodox Church who reads the lessons aloud in the liturgy (analogous to the lector in the Roman Catholic Church) | - |
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| analecta | (noun) a collection of excerpts from a literary work | Synonyms: analects |
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| analects | (noun) a collection of excerpts from a literary work | Synonyms: analecta |
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| analeptic | (noun) a medication used as a stimulant to the central nervous system | - |
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| analogist | (noun) someone who looks for analogies or who reasons by analogy | - |
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| analphabet | (noun) an illiterate person who does not know the alphabet | Synonyms: analphabetic |
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| analphabetic | (noun) an illiterate person who does not know the alphabet | Synonyms: analphabet |
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| analphabetism | (noun) an inability to read | Synonyms: illiteracy |
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| analyst | (noun) someone who is skilled at analyzing data | - |
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| (noun) a licensed practitioner of psychoanalysis | Synonyms: psychoanalyst |
| (noun) an expert who studies financial data (on credit or securities or sales or financial patterns etc.) and recommends appropriate business actions | - |
| analyticity | (noun) the property of being analytic | - |
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| anapaest | (noun) a metrical unit with unstressed-unstressed-stressed syllables | Synonyms: anapest |
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| anapest | (noun) a metrical unit with unstressed-unstressed-stressed syllables | Synonyms: anapaest |
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| anaplasty | (noun) surgery concerned with therapeutic or cosmetic reformation of tissue | Synonyms: plastic surgery, reconstructive surgery |
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| anarchist | (noun) an advocate of anarchism | Synonyms: nihilist, syndicalist |
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| anarthria | (noun) partial or total loss of articulate speech resulting from lesions of the central nervous system | - |
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| anastalsis | (noun) muscular action of the alimentary tract in a direction opposite to peristalsis | - |
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| anastigmat | (noun) compound lens or lens system designed to be free of astigmatism and able to form approximately point images | - |
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| anastomosis | (noun) a natural or surgical joining of parts or branches of tubular structures so as to make or become continuous | Synonyms: inosculation |
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| anastrophe | (noun) the reversal of the normal order of words | Synonyms: inversion |
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