WordNet (r) 3.0 (2006):

beta-lipoprotein
    n 1: a lipoprotein that transports cholesterol in the blood;
         composed of moderate amount of protein and a large amount
         of cholesterol; high levels are thought to be associated
         with increased risk of coronary heart disease and
         atherosclerosis [syn: low-density lipoprotein, LDL,
         beta-lipoprotein]