Stéaróideach
Is éard is stéaróideach ann ná lipid theirpéinóideach arb é a príomhthréith a chroí steréin agus grúpaí feidhmiúla breise. Tá a croí comhdhéanta de struchtúr carbóin de cheithre fáinní comhleáite: trí fáinní cioglaiheacsán agus fáinne amháin cioglaipeintáine. Athraíonn na stéaróidigh de réir na grúpaí feidhmiúla a ghabhann leis na fáinní seo agus staid ocsaídithe na bhfáinní.

Tarlaíonn raon leathan de chomhdhúile ceimiceacha go
nádúrtha i bplandaí, in ainmhithe, agus i bhfungais.

Naisc sheachtracha 
 Michael W. King's Medical Biochemistry . Steroids and retinoids are both terpenes that are hydrophobic, pass through cell membranes and bind to intracellular receptors. However, retinoic acid is not a steroid because it does not have the defining ring structure. See: Steroids and Related Hydrophobic Molecules.
 "Biochemistry" by Jeremy M. Berg, John L. Tymoczko and Lubert Stryer (2002) W. H. Freeman and Co. steroid topics in this
 Insidermedicine in 60 - Trans Fats, Steroid Rage, Calcium and Needlesticks   -- Video: Insidermedicine.com's Dr. Sanjay Sharma on Trans Fats, Steroid Rage, Calcium and Needlesticks.
 Nomenclature of Steroids Home Page at Queen Mary University of London.
 Steroid abbreviations at ISAS (page now defunct, web archive version)
 http://arbl.cvmbs.colostate.edu/hbooks/pathphys/endocrine/basics/steroidogenesis.html 

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