steroid alcohol, sterol - any of a group of natural steroid alcohols derived from plants or animals; they are waxy insoluble substances

HDL cholesterol - the cholesterol in high-density lipoproteins; the `good' cholesterol; a high level in the blood is thought to lower the risk of coronary artery disease

LDL cholesterol - the cholesterol in low-density lipoproteins; the `bad' cholesterol; a high level in the blood is thought to be related to various pathogenic conditions