The Free On-line Dictionary of Computing (30 December 2018):

binary counter

    A digital circuit which has a clock
   input and a number of count outputs which give the number of
   clock cycles.  The output may change either on rising or
   falling clock edges.  The circuit may also have a reset input
   which sets all outputs to zero when asserted.  The counter may
   be either a synchronous counter or a ripple counter.

   (1997-07-03)