| amniote | (noun) any member of the Amniota | - |
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| amniotic | (adjective) of or related to the amnion or characterized by developing an amnion | Synonyms: amnic, amnionic |
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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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| amoeba | (noun) naked freshwater or marine or parasitic protozoa that form temporary pseudopods for feeding and locomotion | Synonyms: ameba |
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| amoeban | (adjective) pertaining to or resembling amoebae | Synonyms: ameban, amebic, amebous, amoebic, amoebous |
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| amoebiasis | (noun) infection by a disease-causing ameba | Synonyms: amebiasis, amebiosis, amoebiosis |
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| amoebic | (adjective) pertaining to or resembling amoebae | Synonyms: ameban, amebic, amebous, amoeban, amoebous |
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| amoebiosis | (noun) infection by a disease-causing ameba | Synonyms: amebiasis, amebiosis, amoebiasis |
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| amoeboid | (adjective) like an amoeba (especially in having a variable irregular shape) | Synonyms: ameboid |
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| amoebous | (adjective) pertaining to or resembling amoebae | Synonyms: ameban, amebic, amebous, amoeban, amoebic |
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| amok | (adjective) wildly frenzied and out of control | Synonyms: amuck, berserk |
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| (adverb) in a murderous frenzy | Synonyms: amuck, murderously |
| (adverb) wildly; without self-control | Synonyms: amuck |
| amora | (noun) one of a group of rabbis (active AD 250-500) who discussed the Mishnaic law in the law schools of Palestine and Mesopotamia where they explained and applied earlier teachings and whose discussions are recorded in the Talmud; they emphasized the study of Torah and the importance of personal action and the fulfillment of the commandments | - |
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| amoralism | (noun) the doctrine that moral distinctions are invalid | - |
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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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| amorally | (adverb) without regard for morality | Synonyms: immorally |
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| amorist | (noun) one dedicated to love and lovemaking especially one who writes about love | - |
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| amoristic | (adjective) of or pertaining to romantic love | - |
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| amorous | (adjective) inclined toward or displaying love | Synonyms: amative |
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| (adjective) expressive of or exciting sexual love or romance | Synonyms: amatory, romantic |
| amorously | (adverb) in an amorous manner | - |
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| amorousness | (noun) a feeling of love or fondness | Synonyms: enamoredness |
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| (noun) the arousal of feelings of sexual desire | Synonyms: amativeness, eroticism, erotism, sexiness |
| amorpha | (noun) any plant of the genus Amorpha having odd-pinnate leaves and purplish spicate flowers | - |
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| amorphophallus | (noun) any plant of the genus Amorphophallus | - |
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| amorphous | (adjective) lacking the system or structure characteristic of living bodies | Synonyms: unstructured |
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| (adjective) without real or apparent crystalline form | Synonyms: uncrystallised, uncrystallized |
| (adjective) unclear because vague or badly organized | - |
| (adjective) having no definite form or distinct shape | Synonyms: formless, shapeless |
| (adjective) (of a group of people or an organization) unorganized or unfocused | - |
| amort | (adjective) utterly cast down | - |
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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 |
| amortise | (verb) liquidate gradually | Synonyms: amortize |
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| 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 |
| amortize | (verb) liquidate gradually | Synonyms: amortise |
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| 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 |
| (verb) to measure up to in kind or quality | Synonyms: add up, come |
| (verb) add up in number or quantity | Synonyms: add up, come, number, total |
| (verb) be tantamount or equivalent to | - |
| amour | (noun) a usually secretive or illicit sexual relationship | Synonyms: affair, affaire, intimacy, involvement, liaison |
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| amoxicillin | (noun) an antibiotic; a semisynthetic oral penicillin (trade names Amoxil and Larotid and Polymox and Trimox and Augmentin) used to treat bacterial infections | Synonyms: Amoxil, Augmentin, Larotid, Polymox, Trimox |
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| amp | (noun) the basic unit of electric current adopted under the Systeme International d'Unites | Synonyms: A, ampere |
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| amperage | (noun) the strength of an electrical current measured in amperes | - |
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| ampere | (noun) the basic unit of electric current adopted under the Systeme International d'Unites | Synonyms: A, amp |
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| (noun) a former unit of electric current (slightly smaller than the SI ampere) | Synonyms: international ampere |
| ampersand | (noun) a punctuation mark (&) used to represent conjunction (and) | - |
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| 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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| amphibia | (noun) the class of vertebrates that live on land but breed in water, frogs, toads, newts, salamanders, caecilians | Synonyms: class Amphibia |
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| amphibian | (adjective) relating to or characteristic of animals of the class Amphibia | Synonyms: amphibious |
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| (noun) cold-blooded vertebrate typically living on land but breeding in water; aquatic larvae undergo metamorphosis into adult form | - |
| (noun) an airplane designed to take off and land on water | Synonyms: amphibious aircraft |
| (noun) a flat-bottomed motor vehicle that can travel on land or water | Synonyms: amphibious vehicle |
| amphibiotic | (adjective) having an aquatic early or larval form and a terrestrial adult form | Synonyms: semiaquatic |
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| amphibious | (adjective) operating or living on land and in water | - |
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| (adjective) relating to or characteristic of animals of the class Amphibia | Synonyms: amphibian |
| amphibole | (noun) a mineral or mineral variety belonging to the amphibole group | - |
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| amphibolite | (noun) a metamorphic rock composed chiefly of amphibole and plagioclase | - |
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| amphibology | (noun) an ambiguous grammatical construction; e.g., `they are flying planes' can mean either that someone is flying planes or that something is flying planes | Synonyms: amphiboly |
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| amphiboly | (noun) an ambiguous grammatical construction; e.g., `they are flying planes' can mean either that someone is flying planes or that something is flying planes | Synonyms: amphibology |
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| amphibrach | (noun) a metrical unit with unstressed-stressed-unstressed syllables (e.g., `remember') | - |
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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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| amphidiploid | (noun) (genetics) an organism or cell having a diploid set of chromosomes from each parent | - |
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| amphidiploidy | (noun) the condition of being amphidiploid | - |
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| amphigory | (noun) nonsensical writing (usually verse) | Synonyms: nonsense verse |
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| amphimixis | (noun) union of sperm and egg in sexual reproduction | - |
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| (noun) reproduction involving the union or fusion of a male and a female gamete | Synonyms: sexual reproduction |
| amphioxus | (noun) small translucent lancet-shaped burrowing marine animal; primitive forerunner of the vertebrates | Synonyms: lancelet |
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| amphipod | (noun) a kind of malacostracan crustacean | - |
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| amphiprostylar | (adjective) marked by columniation having free columns in porticoes either at both ends or at both sides of a structure | Synonyms: amphiprostyle, amphistylar, porticoed |
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| amphiprostyle | (adjective) marked by columniation having free columns in porticoes either at both ends or at both sides of a structure | Synonyms: amphiprostylar, amphistylar, porticoed |
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| amphiprotic | (adjective) having characteristics of both an acid and a base and capable of reacting as either | Synonyms: amphoteric |
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| amphisbaena | (noun) (classical mythology) a serpent with a head at each end of its body | - |
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| amphistylar | (adjective) marked by columniation having free columns in porticoes either at both ends or at both sides of a structure | Synonyms: amphiprostylar, amphiprostyle, porticoed |
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| (adjective) having columns either at both ends or at both sides | - |
| 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 |
| amphitheatric | (adjective) of or related to an amphitheater | Synonyms: amphitheatrical |
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| amphitheatrical | (adjective) of or related to an amphitheater | Synonyms: amphitheatric |
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| amphitropous | (adjective) (of a plant ovule) partly inverted; turned back 90 degrees on its stalk | - |
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| amphiuma | (noun) aquatic eel-shaped salamander having two pairs of very small feet; of still muddy waters in the southern United States | Synonyms: blind eel, congo eel, congo snake |
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| 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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| amphora | (noun) an ancient jar with two handles and a narrow neck; used to hold oil or wine | - |
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| amphoric | (adjective) the sound heard in auscultation resembling the hollow sound made by blowing across the mouth of a bottle | - |
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| amphoteric | (adjective) having characteristics of both an acid and a base and capable of reacting as either | Synonyms: amphiprotic |
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| amphotericin | (noun) an antibiotic and antifungal agent | - |
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| ampicillin | (noun) semisynthetic penicillin (trade names Principen and Polycillin and SK-Ampicillin) | Synonyms: Polycillin, Principen, SK-Ampicillin |
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| ample | (adjective) more than enough in size or scope or capacity | - |
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| (adjective) affording an abundant supply | Synonyms: copious, plenteous, plentiful, rich |
| (adjective) fairly large in size | Synonyms: sizable, sizeable |
| ampleness | (noun) the property of impressive largeness in size | - |
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| (noun) the property of being more than sufficient; comfortable sufficiency | - |
| 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 |
| amplifier | (noun) electronic equipment that increases strength of signals passing through it | - |
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| amplify | (verb) increase in size, volume or significance | Synonyms: magnify |
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| (verb) increase the volume of | - |
| (verb) exaggerate or make bigger | Synonyms: blow up, expand, inflate |
| (verb) to enlarge beyond bounds or the truth | Synonyms: exaggerate, hyperbolise, hyperbolize, magnify, overdraw, overstate |
| 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 | - |
| amply | (adverb) to an ample degree or in an ample manner | Synonyms: richly |
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| (adverb) sufficiently; more than adequately | Synonyms: fully |
| ampoule | (noun) a small bottle that contains a drug (especially a sealed sterile container for injection by needle) | Synonyms: ampul, ampule, phial, vial |
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| ampul | (noun) a small bottle that contains a drug (especially a sealed sterile container for injection by needle) | Synonyms: ampoule, ampule, phial, vial |
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| ampule | (noun) a small bottle that contains a drug (especially a sealed sterile container for injection by needle) | Synonyms: ampoule, ampul, phial, vial |
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| ampulla | (noun) a flask that has two handles; used by Romans for wines or oils | - |
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| (noun) the dilated portion of a canal or duct especially of the semicircular canals of the ear | - |
| ampullar | (adjective) of or related to an ampulla | Synonyms: ampullary |
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| ampullary | (adjective) of or related to an ampulla | Synonyms: ampullar |
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| amputate | (verb) remove surgically | Synonyms: cut off |
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| 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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| amrinone | (noun) a drug (trade name Inocor) used intravenously in heart failure; increases strength of contraction of myocardium | Synonyms: Inocor |
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| amuck | (adjective) wildly frenzied and out of control | Synonyms: amok, berserk |
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| (adverb) in a murderous frenzy | Synonyms: amok, murderously |
| (adverb) wildly; without self-control | Synonyms: amok |
| 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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| amuse | (verb) make (somebody) laugh | - |
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| (verb) occupy in an agreeable, entertaining or pleasant fashion | Synonyms: disport, divert |
| amused | (adjective) pleasantly occupied | Synonyms: diverted, entertained |
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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 | - |
| amusing | (adjective) arousing or provoking laughter | Synonyms: comic, comical, funny, laughable, mirthful, risible |
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| (adjective) providing enjoyment; pleasantly entertaining | Synonyms: amusive, diverting |
| amusingly | (adverb) in an entertaining and amusing manner | Synonyms: divertingly |
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| amusive | (adjective) providing enjoyment; pleasantly entertaining | Synonyms: amusing, diverting |
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| amygdala | (noun) an almond-shaped neural structure in the anterior part of the temporal lobe of the cerebrum; intimately connected with the hypothalamus and the hippocampus and the cingulate gyrus; as part of the limbic system it plays an important role in motivation and emotional behavior | Synonyms: amygdaloid nucleus, corpus amygdaloideum |
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| amygdaliform | (adjective) shaped like an almond | Synonyms: almond-shaped, amygdaloid, amygdaloidal |
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| amygdalin | (noun) a bitter cyanogenic glucoside extracted from the seeds of apricots and plums and bitter almonds | - |
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| amygdaline | (adjective) related to or resembling an almond | - |
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