pg4dPG4D. Abbreviation for: platelet glycoprotein IV deficiency (see there). Segen's Medical Dictionary. © 2012 Farlex, Inc. All rhts reserved.The PIC-PG4D board is a development board for PIC microcontrollers that features a socket for a PIC16F84A or PIC16F628 microcontroller, extension slots, an onboard programmer,