multiport DRAM (MPDRAM)

A dynamic RAM that contains, in addition to the conventional random-access data and address port, a serial-access port that allows serial access to a portion of the stored data in a way that is independent of the normal RAM data terminals and in which simultaneous serial and random operations may be executed. This type of memory has been referred to as "Video RAM" because of its primary field of application.

References: 

JESD21-C, 1/97