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English definition of “steroid”

steroid

noun [C]     /ˈste.rɔɪd/ /ˈstɪər.ɔɪd/ US  /ˈster.ɔɪd/ US  /ˈstɪr.ɔɪd/
one of the different types of chemical substances that are produced in the bodyAnimal biochemistry an artificial form of a natural chemical substance that is used for treating particular medical conditions: I'm taking steroids/I'm on steroids for my asthma.Specific medicines and drugsSpecific types of drug a drug that increases the development of your muscles, sometimes taken illegally by people taking part in sports competitionsSpecific types of drugDrugs - general wordsSpecific medicines and drugs
(Definition of steroid noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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