wart

   A  small,  {crock}y {feature} that sticks out of an otherwise {clean}
   design.  Something  conspicuous  for localized ugliness, especially a
   special-case  exception  to  a  general  rule.  For  example, in some
   versions  of  csh(1), single quotes literalize every character inside
   them  except  !.  In  ANSI  C, the ?? syntax used for obtaining ASCII
   characters in a foreign environment is a wart. See also {miswart}.

[glossary]
[Reference(s) to this entry by made by: {feature}{miswart}]