n. High density lipoprotein, a lipoprotein that transports cholesterol in the blood; high levels are thought to be associated with decreased risk of coronary heart disease and atherosclerosis; sometimes called good cholesterol. Contrasted with LDL. Syn. -- high-density lipoprotein. [ WordNet 1.5 ]
(n) 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