The full form of CSSD in medical means the Central Sterile Services Department (CSSD), which has other names like the sterile processing department, central supply, or central supply department. 

It is an internal department in a healthcare facility or hospital which is responsible for sterilization and other activities for using medical equipment, Instruments and devices. 

This aims to eliminate hospital surgical infections and keep patients safe, plus ensures the proper disinfection of surgical equipment and

Instruments.