HDL

HDL may refer to one of the following:Hardware description languageHigh density lipoproteinHDL (NDB), call sign of a NDB at Plankstadt, Germany.
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HDL high-density lipoprotein. HDL abbr. high-density lipoprotein High-density lipoprotein A type of lipoprotein that protects against coronary [more]HDL - Community and Resources

Noun
1. a lipoprotein that transports cholesterol in the blood; composed of a high proportion of protein and relatively little cholesterol; high levels are thought to be associated with decreased risk of coronary heart disease and atherosclerosis
(synonym) high-density lipoprotein, alpha-lipoprotein
(hypernym) lipoprotein
(substance-meronym) HDL cholesterol

o.h., office hours, work hours; hours that an office is open to the public

High-density lipoprotein.