| 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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