DuckCorp Dico

Found one definition

1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   silicon
      1. <electronics> The material used as the base (or
      "substrate") for most integrated circuits.
      2. <jargon> Hardware, especially integrated circuits or
      microprocessor-based computer systems (compare iron).
      Contrast: software.  See also sandbender.
      [Jargon File]
      (1996-05-28)