HDL definition by Webster's New World
Origin: h(igh-)d(ensity) l(ipoprotein)
HDL definition by American Heritage Dictionary
hdl - Computer Definition
(Hardware Description Language) A language used to describe the functions of an electronic circuit for documentation, simulation or logic synthesis (or all three). Although many proprietary HDLs have been developed, Verilog and VHDL are the major standards. The first book to provide side-by-side examples of subsets of both languages that could be simulated and synthesized was "HDL Chip Design" by Douglas J. Smith, published by Doone Publications, ISBN 0-9651934-3-8. See Verilog and VHDL.