Steroid dǝ organic compound ye dǝwo suronzǝn rings diyeu (A, B, C, kuru D lan bowotǝna) sandi dǝye kǝla sandi moleculabe laa taganasbe lan tuwondǝna.
Steroidsdə cidawa biologybe indi mbeji: sandima awowa faida cell membranesbe doni membrane fluidity faltinma; kuru sandima molecules signalbe.