noun \ˈstir-ˌid also ˈster-\

: a natural substance that is produced in the body

Full Definition of STEROID

:  any of various compounds containing a 17-carbon 4-ring system and including the sterols and numerous hormones (as anabolic steroids or corticosteroids) and glycosides
steroid or ste·roi·dal \stə-ˈri-dəl\ adjective

Examples of STEROID

  1. He was accused of taking steroids.

Origin of STEROID

International Scientific Vocabulary sterol + -oid
First Known Use: 1926


noun \ˈsti(ə)r-ˌid also ˈste(ə)r-\   (Medical Dictionary)

Medical Definition of STEROID

: 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 or ste·roi·dal \stə-ˈrid-əl\ adjective


noun    (Concise Encyclopedia)

Any of a class of natural or synthetic organic compounds with a molecular core, or nucleus, of 17 carbon atoms in a characteristic three-dimensional arrangement of four rings. The configuration of the nucleus, the nature of the groups attached to it, and their positions distinguish different steroids. Hundreds have been found in plants and animals and thousands more synthesized or made by modifying natural steroids. Steroids are important in biology, chemistry, and medicine. Examples include many hormones (including the sex hormones), bile acids, sterols (including cholesterol), and oral contraceptives (see contraception). Digitalis was the first steroid widely used in Western medicine. Corticosteroids (see cortisone) and their synthetic analogs are used to treat rheumatism and other inflammatory ailments. See also anabolic steroid.


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