- steroid - any of several fat-soluble organic compounds having as a basis 17 carbon atoms in four rings; many have important physiological effects
--1 is a kind of organic compound
--1 has particulars:ketosteroid; sterol, steroid alcohol; bile acid; cardiac glycoside, cardiac glucoside - steroid hormone, steroid, sex hormone - any hormone affecting the development and growth of sex organs
--2 is a kind of hormone, endocrine, internal secretion
--2 has particulars:progestin, progestogen; androgen, androgenic hormone; estrogen, oestrogen; corticosteroid, corticoid, adrenal cortical steroid; anabolic steroid - steroid hormone, steroid, sex hormone - any hormone affecting the development and growth of sex organs