Source : Webster's Revised Unabridged Dictionary (1913)

Dyadic \Dy*ad"ic\, a. [Gr. ?, fr. ? two.]
   Pertaining to the number two; of two parts or elements.

   {Dyadic arithmetic}, the same as {binary arithmetic}.

Source : WordNet®

dyadic
     adj : of or relating to a dyad or based on two

Source : Free On-Line Dictionary of Computing

dyadic
     
         {binary} (describing an {operator}).
     
        Compare {monadic}.
     
        (1998-07-24)