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

buffered write-through
write buffer

    A variation of write-through where the
   cache uses a "write buffer" to hold data being written back
   to main memory.  This frees the cache to service read
   requests while the write is taking place.  There is usually
   only one stage of buffering so subsequent writes must wait
   until the first is complete.  Most accesses are reads so
   buffered write-through is only useful for very slow main
   memory.

   (1998-04-24)