What does corticosteroid mean?
Corticosteroids are a class of steroid hormones produced naturally by the adrenal cortex — most famously cortisol — along with the wide range of synthetic drugs modeled on them. They play essential roles in metabolism, stress response, and immune regulation. In medicine, however, they are best known as powerful anti-inflammatory agents: doctors prescribe them to treat asthma, allergies, eczema, arthritis, autoimmune diseases, and many other conditions involving inflammation or overactive immune responses. Because they can be delivered by inhaler, cream, injection, or tablet, they appear across nearly every branch of healthcare. Despite their name, they are unrelated to the anabolic steroids associated with muscle building and sports doping, a distinction worth knowing since both fall under the broad chemical category of steroids. Long-term use carries side effects, so clinicians aim to prescribe the lowest effective dose. The term is technical but increasingly common in everyday health vocabulary.
nounAny of a group of steroid hormones produced by the adrenal cortex, or synthetic drugs modeled on them, that reduce inflammation and suppress immune responses.
- A steroid hormone naturally produced by the adrenal cortex (e.g. cortisol).
- A synthetic drug based on these hormones, used medically to reduce inflammation or suppress immunity.
"The doctor prescribed a corticosteroid to bring down the inflammation in her airways."
"Inhaled corticosteroids are the mainstay of long-term asthma control."
"Because cortisol is the body's principal natural corticosteroid, adrenal disorders can disrupt its production."
Standard English plural, formed regularly. Commonly used when referring to the class of drugs or hormones as a group rather than one specific compound.
"Long-term corticosteroids can weaken bone density, so doctors monitor patients carefully."
Despite the name, corticosteroids have nothing to do with the muscle-building 'steroids' athletes get banned for — they're the body's own inflammation-fighters, made in your adrenal glands.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of corticosteroid
The word combines 'cortex', referring to the outer region of the adrenal gland where these hormones are made, with 'steroid', from the broader class of chemically related compounds built on a four-ring molecular structure. Both elements trace back to Latin and Greek roots: cortex is Latin for 'bark' or 'rind', while steroid derives from sterol-related chemistry terminology developed in the late nineteenth century. The compound term emerged in mid-twentieth-century medical literature as biochemists identified and then synthesized these adrenal hormones.
Related word forms
How corticosteroid is actually used
Predominantly a medical and scientific term; in everyday speech it appears mainly in discussions of treatment. The plural is standard in clinical writing when referring to multiple drugs within the class.
Easily confused with corticosteroid
Cortisone is one specific corticosteroid hormone, whereas corticosteroid refers to the entire class of related hormones and drugs.
Anabolic steroids are synthetic steroids used to build muscle mass, while corticosteroids are anti-inflammatory and immune-suppressing agents.