Definition of steroid
: any of various compounds containing a 17-carbon 4-ring system and including the sterols and numerous hormones (such as anabolic steroids or corticosteroids) and glycosides Fifty steroids have been shown to be present in the adrenal cortex. Only seven of these, however, have been shown to exert a significant biological effect related to adrenal cortical function.— John E. Hoover often, specifically : anabolic steroid an athlete taking/using steroids a steroid user Their … reporting triggered a national wake-up call about steroid use that led to congressional hearings, and, at long last, steroid testing in baseball. — Rick Reilly
1 : taking anabolic steroids an athlete accused of being on steroids The term [road rage] was presumably based on "roid rage," referring to sudden violent activity by people on steroids.— Michael Fumento
2 informal : greatly increased in size or power beyond what is normal or usual With one giant claw and one smaller one, the creature looks like a fiddler crab on steroids.— Don Wilson … the inflation of a military budget that already looks as though it's on steroids.— Donald Kaul Only technology could cook it in record time. A microwave oven on steroids, that cooks eight times faster than other conventional ovens.— James Hattori et al.
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