niladic

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

niladic

   <programming> A less common synonym for "{nullary}",
   presumably following the more common {monadic}, {dyadic}, etc.
   The term was in use as early as 1976, and probably originated
   in {APL}.

   [APL: An Interactive Approach, 1976].

   (2001-01-27)