MicroDIMM
full spelling ： Micro Dual In-Line Memory Module
MicroDIMM is a type of memory module used in computers. It is an extremely small RAM form factor. MicroDIMM is about 45.5 millimeters long and 30 millimeters wide in physical size. It is over 50 percent smaller than an SODIMM.
MicroDIMMs are available in 144-pin SDRAM, 172-pin DDR. MicroDIMMS are primarily used in notebooks and notebook computers.