Glossary of HIV/AIDS Terms
This glossary contains 1,600 terms and is maintained by the editors of the San Francisco AIDS Foundation's Bulletin of Experimental Treatments for AIDS.
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cholesterol: a waxy, fatty substance in animal tissue that is an essential component of cell membranes and nerve fiber insulation. There are three types of cholesterol in the blood: low-density lipoprotein (LDL), which is considered a risk factor for heart disease; high-density lipoprotein (HDL), which is considered protective against heart disease; and very low density lipoprotein.