| amobarbital | (noun) a barbiturate with sedative and hypnotic effects; used to relieve insomnia and as an anticonvulsant | - |
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| arbiter | (noun) someone chosen to judge and decide a disputed issue | Synonyms: arbitrator, umpire |
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| (noun) someone with the power to settle matters at will | Synonyms: supreme authority |
| arbitrable | (adjective) appropriate for or subject to settlement by arbitration | - |
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| arbitrage | (noun) a kind of hedged investment meant to capture slight differences in price; when there is a difference in the price of something on two different markets the arbitrageur simultaneously buys at the lower price and sells at the higher price | - |
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| (verb) practice arbitrage, as in the stock market | - |
| arbitrager | (noun) someone who engages in arbitrage (who purchases securities in one market for immediate resale in another in the hope of profiting from the price differential) | Synonyms: arb, arbitrageur |
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| arbitrageur | (noun) someone who engages in arbitrage (who purchases securities in one market for immediate resale in another in the hope of profiting from the price differential) | Synonyms: arb, arbitrager |
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| arbitral | (adjective) relating to or resulting from arbitration | Synonyms: arbitrational |
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| arbitrament | (noun) the act of deciding as an arbiter; giving authoritative judgment | Synonyms: arbitration, arbitrement |
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| arbitrarily | (adverb) in a random manner | Synonyms: at random, every which way, haphazardly, indiscriminately, randomly, willy-nilly |
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| arbitrariness | (noun) the trait of acting unpredictably and more from whim or caprice than from reason or judgment | Synonyms: capriciousness, flightiness, whimsey, whimsicality, whimsy |
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| arbitrary | (adjective) based on or subject to individual discretion or preference or sometimes impulse or caprice | - |
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| arbitrate | (verb) act between parties with a view to reconciling differences | Synonyms: intercede, intermediate, liaise, mediate |
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| arbitration | (noun) the act of deciding as an arbiter; giving authoritative judgment | Synonyms: arbitrament, arbitrement |
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| (noun) (law) the hearing and determination of a dispute by an impartial referee agreed to by both parties (often used to settle disputes between labor and management) | - |
| arbitrational | (adjective) relating to or resulting from arbitration | Synonyms: arbitral |
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| arbitrative | (adjective) relating to or having the authority to arbitrate | - |
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| arbitrator | (noun) someone chosen to judge and decide a disputed issue | Synonyms: arbiter, umpire |
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| arbitrement | (noun) the act of deciding as an arbiter; giving authoritative judgment | Synonyms: arbitrament, arbitration |
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| barbican | (noun) a tower that is part of a defensive structure (such as a castle) | Synonyms: barbacan |
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| barbital | (noun) a barbiturate used as a hypnotic | Synonyms: barbitone, diethylbarbituric acid, diethylmalonylurea, veronal |
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| barbitone | (noun) a barbiturate used as a hypnotic | Synonyms: barbital, diethylbarbituric acid, diethylmalonylurea, veronal |
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| barbiturate | (noun) organic compound having powerful soporific effect; overdose can be fatal | - |
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| carbide | (noun) a binary compound of carbon with a more electropositive element | - |
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| carbine | (noun) light automatic rifle | - |
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| carbineer | (noun) a soldier (historically a mounted soldier) who is armed with a carbine | Synonyms: carabineer, carabinier |
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| cedarbird | (noun) widely distributed over temperate North America | Synonyms: Bombycilla cedrorun, cedar waxwing |
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| harbinger | (noun) something that precedes and indicates the approach of something or someone | Synonyms: forerunner, herald, precursor, predecessor |
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| (verb) foreshadow or presage | Synonyms: announce, annunciate, foretell, herald |
| hypercarbia | (noun) the physical condition of having the presence of an abnormally high level of carbon dioxide in the circulating blood | Synonyms: hypercapnia |
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| mephobarbital | (noun) a long-acting crystalline barbiturate (trade name Mebaral) used as a sedative and as an anticonvulsant in the treatment of epilepsy | Synonyms: Mebaral |
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| metharbital | (noun) anticonvulsant drug (trade name Gemonil) used in the treatment of epilepsy | Synonyms: Gemonil |
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| nonarbitrable | (adjective) not appropriate for or subject to arbitration | - |
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| nonarbitrary | (adjective) not subject to individual determination | Synonyms: unarbitrary |
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| pentobarbital | (noun) a barbiturate (trade name Nembutal) used as a sedative and hypnotic and antispasmodic | Synonyms: Nembutal, pentobarbital sodium, yellow jacket |
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| phenobarbital | (noun) a long-acting barbiturate used as a sedative | Synonyms: Luminal, phenobarbitone, purple heart, sodium thiopental |
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| phenobarbitone | (noun) a long-acting barbiturate used as a sedative | Synonyms: Luminal, phenobarbital, purple heart, sodium thiopental |
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| secobarbital | (noun) barbiturate that is a white odorless slightly bitter powder (trade name Seconal) used as a sodium salt for sedation and to treat convulsions | Synonyms: red devil, secobarbital sodium, Seconal |
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| unarbitrary | (adjective) not subject to individual determination | Synonyms: nonarbitrary |
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