superuser

from Jargon File (4.4.4, 14 Aug 2003)

superuser
 n.

   [Unix] Syn. {root}, {avatar}. This usage has spread to non-Unix
   environments; the superuser is any account with all {wheel} bits on. A
   more specific term than {wheel}.

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

superuser

   [Unix] Synonym {root}, {avatar}.  This usage has spread to
   non-Unix environments; the superuser is any account with all
   {wheel} bits on.  A more specific term than {wheel}.

   [{Jargon File}]

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