steroid

noun

ste·​roid ˈster-ˌȯid 

also

ˈstir- 

plural steroids

: 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

see also steroid hormone

steroid adjective

or steroidal

stə-ˈrȯi-dᵊl 

Phrases

on steroids

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.

Examples of steroid in a Sentence

He was accused of taking steroids.

Recent Examples on the Web

Since joining the Miami Herald in 1999, he’s covered the federal courts nonstop, from Elian Gonzalez’s custody battle to Alex Rodriguez’s steroid abuse. —Jay Weaver, Miami Herald, 22 May 2025

Development on steroids Exiles came together very quickly to unveil during the annual LA Screenings where Sony TV is looking to line up international (as well as domestic) buyers for the new series. —Nellie Andreeva, Deadline, 21 May 2025

Johnson's Return to Public Attention The Netflix documentary Untold: The Liver King, which landed on the streaming platform on May 13, pulls back the curtain on Johnson's rise from supplement hawker to internet icon—and the impact of the steroid scandal. —Melissa Fleur Afshar, MSNBC Newsweek, 16 May 2025

He was given steroids and high-grade painkillers that carried risks of stunted growth and weakened ligaments. —Jason Quick, New York Times, 15 May 2025

Word History

Etymology

International Scientific Vocabulary sterol + -oid

First Known Use

1926, in the meaning defined above

Phrases Containing steroid

• anabolic steroid
• steroid hormone

Rhymes for steroid

• alloyed
• android
• annoyed
• avoid
• centroid
• convoyed
• cuboid
• cycloid
• decoyed
• deployed
• dermoid
• destroyed

Kids Definition

steroid

noun

ste·​roid ˈstir-ˌȯid  ˈster- 

: any of various chemical compounds that include numerous hormones (as estrogen and testosterone) compare anabolic steroid

Medical Definition

steroid

noun

ste·​roid ˈsti(ə)r-ˌȯid 

also

ˈste(ə)r- 

: any of numerous natural or synthetic compounds containing a 17-carbon 4-ring system and including the sterols and various hormones and glycosides see anabolic steroid

steroid adjective

or steroidal

stə-ˈrȯid-ᵊl