steroid
US /ˈster.ɔɪd/
UK /ˈster.ɔɪd/
1.
any of a large class of organic compounds with a characteristic molecular structure containing four rings of carbon atoms (three six-membered and one five-membered). They include many hormones, alkaloids, and vitamins.
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Cortisol is a natural steroid hormone produced by the adrenal glands.
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Many medications are derived from steroids.
2.
anabolic steroids, used to increase muscle mass and strength, often illegally.
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The athlete was banned for using performance-enhancing steroids.
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Taking steroids without medical supervision can have serious side effects.