HDL

from WordNet (r) 3.0 (2006)

HDL
    n 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 [syn: {high-density lipoprotein},
         {HDL}, {alpha-lipoprotein}]

from The Collaborative International Dictionary of English v.0.48

HDL \HDL\ ([=a]ch`d[=e]*[e^]l"), 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]

from The Free On-line Dictionary of Computing (8 July 2008)

Hardware Description Language
HDL

   <language> (HDL) A kind of language used for the conceptual
   design of {integrated circuits}.  Examples are {VHDL} and
   {Verilog}.

   (1995-04-18)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

HDL
       Hardware Description Language (ASIC)

[email protected]