单词	caffeine
释义	caffeinecaf‧feine /ˈkæfiːn $ kæˈfiːn/ noun [uncountable] Word Origin WORD ORIGINcaffeine Origin: 1800-1900 German kaffein, from kaffee ‘coffee’, from French café Examples EXAMPLES FROM OTHER DICTIONARIES Avoid caffeine three to four hours before bedtime. EXAMPLES FROM THE CORPUS He was told to gradually cut these out, along with all other drinks containing caffeine. It was only after the caffeine began to work that he realized that everyone was kind of waiting for something to happen. Many brands of aspirin and aspirin substitutes include a significant dose of caffeine. Not only must the caffeine be eliminated, but the break-down products have to be eliminated as well. Obvious examples include caffeine and ephedrine, the latter being readily available to the public in over-the-counter cold remedies. Progress in learning how alcohol and caffeine work has had to wait for new knowledge of how the brain works. Under the influence of a pint of caffeine the world seemed a friendlier place. You put caffeine behind some other drug you've got inside you, and it gives that drug a kick. word sets WORD SETS► Drugs/Medicines anabolic steroid, nounanaesthetic, nounantacid, nounantibiotic, nounantidepressant, nounantidote, nounantihistamine, nounanti-inflammatory, adjectiveantitoxin, nounaspirin, nounbalm, nounbalsam, nounbandage, nounbandage, verbBand-Aid, nounbarbiturate, nounbatch, nounBCG, nounbelladonna, nounbeta-blocker, nounbismuth, nounbooster, nouncaffeine, nouncapsule, nouncastor oil, nounchemotherapy, nounclinical, adjectivecodeine, nouncondom, nouncortisone, nouncough mixture, noundepressant, noundisinfect, verbdisinfectant, noundispensary, noundispense, verbdispensing chemist, noundiuretic, noundosage, noundose, noundose, verbdraught, noundrip, noundrug, noundrug, verbdruggist, noundrugstore, nounear drops, nounemetic, nounemollient, adjectiveEpsom salts, nouneucalyptus, nounexpectorant, nounfluoridate, verbfluoride, nounfolic acid, noungripe water, nounhallucinogen, nounhemlock, nounherbal, adjectiveherbal medicine, nounhypnotic, nounimmunize, verbinfusion, nouninhalant, nouninhaler, nouninject, verbinjection, nouninoculate, verbintravenous, adjectiveiodine, nounlaxative, nounlotion, nounlozenge, nounmagnesia, nounmedicament, nounmedicated, adjectivemedication, nounmedicinal, adjectivemedicine, nounmelatonin, nounmethadone, nounmilk of magnesia, nounmorning-after pill, nounmorphia, nounmorphine, nounnarcotic, nounnarcotic, adjectiveneedle, nounniacin, nounnicotine patch, nounobstetrician, nounointment, nounopiate, nounopium, nounoral contraceptive, nounoverdose, nounover-the-counter, adjectivepack, nounpainkiller, nounparacetamol, nounpastille, nounpatch, nounpatent medicine, nounpenicillin, nounpharmaceutical, adjectivepharmaceuticals, nounpharmacist, nounpharmacology, nounpharmacopoeia, nounpharmacy, nounplacebo, nounprescribe, verbprescription, nounpurgative, nounquinine, nounRDA, nounreaction, nounremedy, nounrubbing alcohol, nounsalve, nounsedation, nounsedative, nounsenna, nounserum, nounside effect, nounsleeping pill, nounspecific, nounsteroid, nounstimulant, nounstrychnine, nounsuppository, nounsurgical spirit, nounsyringe, nountablet, nountake, verbThalidomide, nountherapist, nountincture, nountonic, nountranquillizer, nountruth drug, nounvaccinate, verbvaccine, nounValium, nounVaseline, nounwitch-hazel, noun Collocations COLLOCATIONS FROM THE CORPUSVERB► contain · As cocoa contains caffeine, it would have stimulated the Temperance workers on their way.· Arabica beans are harder to grow, produce more flavorful coffee, and contain about half the caffeine of robusta beans.· Drink: It is well-known that tea and coffee contain caffeine and that caffeine is a stimulant.· Thus, with the exception of water, all of the most popular beverages on earth contain either caffeine or alcohol.· But both of these contain caffeine and other chemical stimulants which are quickly absorbed into the bloodstream.· Mountain Dew -, for instance, contains 54 milligrams of caffeine per can.· One of the better-known brands, Cafergot, contains 100 milligrams of caffeine in each tablet or suppository. a substance in tea, coffee, and some other drinks that makes you feel more active → decaffeinated:  Avoid caffeine (=drinks with caffeine) before bedtime. a caffeine-free cola—caffeinated /ˈkæfɪneɪtɪd/ adjective
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