zigamorph

from Jargon File (4.4.4, 14 Aug 2003)
zigamorph
 /zig'@.morf/, n.

   1. Hex FF (11111111) when used as a delimiter or {fence} character.
   Usage: primarily at IBM shops.

   2. [proposed] n. The Unicode non-character U+FFFF (1111111111111111),
   a character code which is not assigned to any character, and so is
   usable as end-of-string. (Unicode is a 16-bit character code intended
   to cover all of the world's writing systems, including Latin, Greek,
   Cyrillic, Chinese, hiragana, katakana, Devanagari, Thai, Laotian and
   many other scripts -- support for {elvish} is planned for a future
   release).
    
from The Free On-line Dictionary of Computing (8 July 2008)
zigamorph

   /zig'*-morf/ 1. {Hex} FF (11111111) when used as a {delimiter}
   or {fence} character.  Usage: primarily at {IBM} shops.

   2. [proposed] The {Unicode} non-character +UFFFF
   (1111111111111111), a character code which is not assigned to
   any character, and so is usable as end-of-string.

   [{Jargon File}]
    

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