Definition of steroid in English:

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Pronunciation: /ˈsterˌoid/
Pronunciation: /ˈstirˌoid/


1Any of a large class of organic compounds with a characteristic molecular structure containing four rings of carbon atoms (three six-membered and one five). They include many hormones, alkaloids, and vitamins.
Example sentences
  • It is an important part of a healthy body, being a building block for steroids such as the sex hormones, and the hormones of the adrenal cortex.
  • Vitamin D is a steroid produced in the skin through a reaction between cholesterol and sunlight.
  • One of the steroids it produces is cortisol, which increases the supply of glucose in the blood.
1.1 short for anabolic steroid.
Example sentences
  • Well, this has a lot of eyes on Major League Baseball and its policy about drug testing and steroids.
  • If he has a poor spring, some will doubt he even belongs in the big leagues without steroids.
  • These doses were comparable with the doses that many athletes who use steroids take.


on steroids

Used to suggest a highly exaggerated, enhanced, or accelerated version of something: high-protein gelatin squares, available in bright red or bright green, sort of like Jell-O on steroids
More example sentences
  • What we have here is business as usual - and hypocrisy on steroids.
  • I mean, physically, I can't, because these things are, like, veneers on steroids.
  • You know, they all look a little bit like a Palm Pilot on steroids, essentially, because they're so big.



Pronunciation: /steˈroidl/ Pronunciation: /sti-/
Example sentences
  • Although brain inflammation is evident in Alzheimer's disease, prospective trials of steroidal and nonsteroidal anti-inflammatory drugs have failed to show benefit.
  • Conjugated estrogens, a subgroup of the broad group of steroidal estrogens, are already listed as ‘known’ and drug labeling or package inserts discuss the possible side-effects that occur in some people.
  • Unlike other aromatase inhibitors, exemestane is a steroidal aromatase inactivator, which means it selectively targets and irreversibly binds to the aromatase enzyme, which is required to produce estrogen.


1930s: from sterol + -oid.

For editors and proofreaders

Syllabification: ste·roid

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