The Free On-line Dictionary of Computing (30 December 2018):

Intel 80x86
80x86
8x86
Intel x86
x86

    (x86) One of the family of Intel
   microprocessors including the Intel 80186, Intel 80286,
   Intel 80386, Intel 486, in a more general sense also
   Intel 8086, Pentium, Pentium Pro, and Pentium II.

   The abbreviation "x86" also includes compatible processors,
   e.g. from Cyrix or AMD.

   (2004-02-27)