pos>n. [ acronym from Low-Density Lipoprotein. ] (Med., Biochem.) Low-density lipoprotein, a lipoprotein that transports cholesterol in the blood; high levels are thought to be associated with increased risk of coronary heart disease and atherosclerosis; sometimes called informally bad cholesterol.
Syn. -- low-density lipoprotein. [ WordNet 1.5 ]