infix syntax

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

infix notation
infix syntax

   <language> One of the possible orderings of {functions} and
   {operands}: in infix notation the functions are placed between
   their operands, such as "1+2".  Although infix notation is
   limited to binary functions most languages mix infix notation
   with {prefix} or {postfix} notation, as a form of {syntactic
   sugar}.

   (1997-01-17)